File:  [Nicadd] / ttbar / p20_taujets_note / ttbarnote_v1.9.dvi
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Wed May 18 21:30:39 2011 UTC (13 years, 2 months ago) by uid12904
Branches: tauNote
CVS tags: v-00
Initiall commit

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F."ʾ6|rET	hsignicanceoptimization2768NG."CrosssectionmeasuremenCtswhensignalcontaminationisignoredf69 1.,tResultsforSet=metl,ҼHT,topmassl,aplan,sqrts,metl>4.0,lumi=4951.86/pb,V9CjetsandNNelec,t>T0.9369 2.,tResultsTforSet=metl,HT,topmassl,aplan,sqrts,metl>4.0,lumi=4951.86/pb,V9Cjetsandno,tNNelecTcutwk70u2F4jvغI.INTRCODUCTIONW4Since׋itsdiscovery׋attheF*ermilabTEVATRONicolliderin1995,thetopquarkhasbGeenoneofthemostW5impGortant}KtopicsinHighEnergyPhysics.ThestudyofitsproGductionrateandpropertiesallowsustoW6pGerform&precisiontestsofstandardmodel(SM)predictionsaswellasrepresentsachanceofobservingW7pGossiblej.deviationsfromsuchpredictions.QAmongstallsubsequenttopdecays,odtheproGcess
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cmsy10!Wcb!!	0ercmmi75bW8representsaoneofthemostimpGortanttoGolsforprobingbeyond-SMaphysics. F*orainstance,theMSSM(MinimalW9SupGersymmetricStandardModel)[1]predictstheexistenceofthedecaytH!H^ٓRcmr7+sbifm"&HkZcmr5+ҍ0ncmsy5<Hmt
lmbD.[As101the0Higgs-fermioncouplingispropGortionaltothelatter'smass,g_thesubsequentdecayofachargedHiggs11bGoson0intoaleptonismuchmorefavoredthanitsdecaysintoe'sand's.NfTherefore,kforhighvqaluesoftan12WW(the;ratioofthevqacuumexpGectationvaluesofthetwo;Higgsdoublets)thechargedHiggspreferentially13decaysto!5,͖whichincreasesthebranchingratio(BR)poftgn!!5brelativetotheSMpprediction.dThus,14anynon-standard
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InthisanalysiswestudytheproGcesswhentheW^&bosonfromoneofthetopquarksdecaysintoa^lepton18andwitsassoGciatedneutrino,JwhiletheotherWAbosondecaysintoaquark-antiquarkpair.Theyisthe19heaviestleptonanditspromptdecayintootherparticlesandtheprobabilityofbGeingfakedbyelectrons,20muonsUUandjetsmakesitsreconstructionandidenticationmuchmoredicultthanothertopdecays.21
HeretwefoGcusoneventswheretheidecayshadronically*,|umeaningtooneorthreechargedhadrons,|uzero22orӌmoreneutralhadronsandatauneutrino.FThisimpliesthatoursignalconsistsofanalstatewithfouror23moreejets.Figures1and2showrespGectivelytheF*eynmandiagramthatdecribGestheprocesst'#bt}!>e+CVjets24andUUthepiechartoftopdecay*.qInSectionIGIwediscussorsignalandmainbackgrounds.25z4CPSfile="plots/feynman.eps" llx=73 lly=382 urx=522 ury=721 rwi=2245 WMFIG.T1:pF:eynmandiagramfortVۍ %t!Ƽ7+8jets. 2F5rԱ=PSfile="plots/pie.ps" llx=14 lly=14 urx=612 ury=792 rwi=2392 FIG.T2:pT:opquarkdeca9ypiechart.
The@presentworkisthethirdmeasurementofthet'#btcrosssectioninthe15+njetschannelpGerformedwith26theq!Ddetector.+Previousresults[2,x3x]usedusingp14RunIqandp17RunIGIaDataandaresummarizedin27T*ableUUI(onlystatisticaluncertaintiesareshown).28"Dzff<&h
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InUUthisanalysiswechosethethreejetstriggerJT2ff3JT15LffIPffVX.49
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cmti10Ec}'orrection3>factorsCandthenprovideacorrectnormalization.NThesecorrectionfactors69were(takenfromF<x

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ffff6玎K{kdT:ABLETV:MCSamples.pHerel;standsforthethreelepton
a9vorT(e,and).Sdeca9ysarenotrestricted.	h22F9jD.
^MCsamplescorrections84
StandardUUDcorrectionsareappliedtoMCinordertoobtainabGetterMC-dataagreement[13
].85?"V

cmbx10T
riggerFeciency:3anadditionalscalefactor(weight)isappliedtoMCخtoaccountforthetriggereciency86inUUdata.qF*urtherdetailsaregiveninSectionIGII.87Luminosit9y&xreweighting:inordertoreproGduceluminosityeectsfromrealdata,simulatedsamplesare88overlaidItoZeroBiasdataDuetoadierenceinintantaneousIluminositybGetweentheoverlayandrealdata,89theUUluminosityproleofallMCsamplesisreweightedtomatchtheluminosityproleindata[14
].90PrimaryVBv9ertexreweighting:Rz6	vertexrdistributionsaredierentbGetweendataandMC.Thisdierence91iscorrectedbyreweightingMCzowvertexdistributionsusingthereweightproGcessorfromtheFcafEff&fǫmcEff&futil92packqageUU[15
].93WZ@andZpTCgrew9eighting:iforPbGothW+jetsandZ+jets,thepT
distributionfromMCPsamplesis94reweightedUUtomatchtheequivqalentdistributionindata,accordinglytothestandardway[16
].95bfragmen9tation:
thejwsystematicsonthereweightjwoftheb-fragmentationfunctionfromthedefaultin96PythiatothevqaluetunedtoreproGducecolliderdatawasassumedtobethesymmetrizeddierencebetween97theUUAODandSLDtunes[17
].98JetShiftingSmearingandRemo9ving(JSSR):)&duetodierencesinenergyscale,^resolution,recon-99structionandidenticationbGetweendataandMC,MCjetsareshifted,	smearedandpGossiblyremovedusing100standard}JSSR}proGcessor[18
]._Inthisanalysisshiftingisturnedotosignalt'#btOandontoWG=qZ4+jets101samples.102T
au0EnergyScale(TES):DduetotheanalysissensitivitytoanydierencebGetweendataandMC0inthe103energy&scaleoftausdecayinghadronicallyweapplyaE=pcorrectiontothisenergyscaleasdescribGedin104[19
].105!C%{IKII.TRIGGERPARAMETRIZATION106
AsaforementionedthetriggerusedinthisanalysisisJT2ff3JT15LffIPffVX.InbGothv15andv16trigger107versions,$thistriggerhas4termsatlevel2.]Currently*,$onlythreeofthese,theL2HTL,missingET	ep(6qȵETL)and108sphericitybasedbrancheshavebGeenmodelledbythehbbgroup[5].gaThereforethesearetheonesusedin109this<analysis.i[Themissingtermistheacoplanarityterm,Anamely*,L2JET(1,20,2.4)<L2HT(35,6)MJT(20,10)110L2ACOP(168.75),UUwhichisthesameinbGothv15andv15triggerlists.111
T*ableUUVIshowstheL1,L2andL3requirementsofthetrigger.112
Initswork,)thehbbgrouphasparametrizedthetriggerinthreeinstantaneousluminosity(10^32x)regions:113low(Lint<77),medium(77̵Lint<124)andhigh(Lint̲124).
Thenalgoalistomeasurethe114totaltriggereciencyforourevents.CInordertodosowetakeintoaccountbGoththetriggerprobabilities115andtheb-tagprobabilities.&Thus,thetriggerprobabilitiesfor0,1,2and3ormoreb-taggedjetsarethen116multiplied~bytheprobabilitiesof0,,1,2and3ormorejetsbGeingtagged,whicharethemselvesgotfrom117TRF's,UUasdescribGedinsectionIVD.118
The3triggereciencyiscomputedasaprobability(ET;rigWeight)whichweassoGciatetoeachMC2event119with:120|"fP*=Pt0	8Pb0
9+Pt1Pb1
9+Pt2Pb2
9+PtO!cmsy73Pb3((1)wherePti	Y@isthetriggerprobabilityfortheeventifithasib-tagsandPbi	.isinturntheprobabilityofhaving121iUUb-tagsintheeventUUoinereconstruction.122123
Whatfollowsisabriefdescriptionofhowthetriggerprobabilitiesateachlevelwerecalculated.s%Single-124ob8jectturn-oncurvesweredeterminedusingmuontriggeredeventsfromtheTOPJETTRIGskim.>Some125turn-onUUcurvesarefoundinAppGendixB.qAmorecompletedescriptioncanbefoundin[5].126
ʠ2E103/B37ffPMffffPMYLev9elv15ΉffPML1MCSWJT(3,8,3.2)CSWJT(2,15,2.4)CSWJT(1,30,2.4)
L2axL2JET(3,6)TL2HT(75,6)SPHER(0.1)ORbEL2JET(1,30,2.6)TL2JET(2,15,2.6)L2JET(3,8)L2HT(75,6)MJT(10,10)OR=>ML2JET(1,30,2.6)TL2JET(2,15,2.6)L2JET(3,8)L2HT(100,6)L3<3L3JET(3,15,3.6)TL3JET(2,25,3.6)jzPV
оjƼ<35cm>FHBT:A9G(0.4)ffPMYNamelJT2ffgTy3JT15LffgIPffgVXffPMffffPMP]=~37ffZ>ffffZ>YLev9elv16ΉffZ>L1S6CSWJT(3,8,3.2)CSWJT(2,15,2.4)CSWJT(1,30,2.4)
L2F~L2JET(3,6)TL2HT(75,6)SPHER(0.1)STTIP(1,5.5,3)OR">L2JET(1,30,2.6)TL2JET(2,15,2.6)L2JET(3,8)L2HT(75,6)MJT(20,10)ORbEL2JET(1,30,2.4)TL2JET(2,15,2.4)L2JET(3,8,2.4)L2HT(75,6)STTIP(1,5.5,3)L3IL3JET(3,15,3.6)TJT(2,25,3.6)jzPV
оjƼ<35cm>FHBT:A9G(0.4)ffZ>YNameJT2ffgTy3JT15LffgIPffgVXffZ>ffffZ>?㩍T:ABLEgnVI:Lev9el-by-levelgndescriptionoftriggerJT2ffgTy3JT15LffgIPffgVX.gnTheCSWJT(x,y,z)termcorrespAondstoxL1
jetsabAo9veyGeVandwithinjRjƼ<z8b.VTheJT(x,y:,z)termcorrespAondstoxjetsreconstructedatL2orL3withpTm>yGeVEandFjRjƼ<zc.TheFHT(x,y)termisusedonlyatL2andrequiresthatthesumofthetransv9ersemomentaofL2jetsciwithpTϼ>yGeVcUisabAo9vecixGeV.TheSPHER(0.1)termrequirestheev9entcisphericitycalculatedfromL2jetstobAegreaterthan0.1.7TheMJT(x,y)termcorrespondstoamissingtransv9erseenergy>xGeVmcalculatedfromjetslwithET>yGeV.TheSTTIP(1,5.5,3)termrequiresoneL2STTltrac9kwithanimpactparametersignicancegreaterthanorequaltothreeanda-=2m<ƹ5:5.KThejzPV
оj<35cm>3htermrequirestheprimaryv9ertexreconstructedatL35>tobAewithin35cmofthecen9terofthedetectorandtheBT:AG(0.4)termisusedonlyatL3andcorrespAondstoaTcutof0.4ontheprobabilit9yfortheeventtonotcontainab-quark.-dA.
^LevCel1127Level1consistsofjettermsonly:X1jetwithET	Ƶ>30GeV
andj[ٸj3<2:4,OasecondjetwithET>15GeV128andUUj[ٸj<2:4andathirdjetwithET	ε>8GeVandj[ٸj<3:2.qThetotalL1probabilityisgivenby129'z@LʍPc(L1)+=[Pc(3jetsUW)8+P(=2jetsUW)P(1noiseUUjet$q)+P(=1jetc)P(2noiseUUjets(c)+P(=0jetsUW)P(3noiseUUjets(c)]V8[Pc(2jetsUW)+P(=1jetc)P(1noiseUUjet$q)+P(=0jetsUW)P(2noiseUUjets(c)]V8[Pc(1jetc)+P(=0jetsUW)P(1noiseUUjet$q)]ɍ((2)Ɏ'pzwherePc(dXxjets)istheprobabilityofhavingxormorejetspresentintheeventandPc(=dXxjets)is130the)yprobabilityofhavingexactlyxjetsintheevent.	4ThetermEnoiseBjetsreferstoallthoseL1jets131that­didn'tmatchtoanoinejetwithinR;<'0:5.IntheequationabGovetherstlinecorrespGonds132to#thetermCSWJT(3,8,j[ٸj<3:2$),`thesecondtothetermCSWJT(2,15,j[ٸj<2:4)andthethirdtotheterm133CSWJT(1,30,j[ٸj<2:4$).:L1jetsthatmatchedoineoneshadtheirturn-oncurvesparametrizedasfunctions134ofkqoinejetpTc's.ThenumbGerkqofnoisejetspereventkqwasparametrizedasafunctionofoineHTL.AllL1135turn-onUUcurvesarefoundinAppGendixB1.136 WϠB.
^LevCel2137Levelm#2partofthistriggerconsistsofanORmofthreeterms(hereclassiedasEtop,sEhbbandEmjt),eachwith138aUUvqariationforv15andv16:139|v15Ttop:-5G3UUjetswithpT	ε>8GeV,2withpT>15GeV,1withpT>30GeVandHT>100GeV1402v16Ttop:-5G3$jetswithpT	ε>8GeV,2withpT>15GeV,1withpT>30GeV,HT>75GeV$andSTTIPwith141IPSIGUU3and^2C<5:5.142v15Th9bb:/q3UUjetswithpT	ε>6GeV,HT>75GeVandsphericity>0.1143v16Th9bb:/q3jetswithpT	ε>6GeV,HT>75GeV,sphericity>0.1andSTTIPwithIPSIG3and^2C<5:5.1442E11jv15Tmjt:.*3jetswithpT	o>8GeV,2jetswithpT>15GeV,1jetwithpT>30GeV,HT>75GeVand6ET145>UU10GeV.146v16Tmjt:.*3jetswithpT	o>8GeV,2jetswithpT>15GeV,1jetwithpT>30GeV,HT>75GeVand6ET147>UU20GeV.148
F*orUUthislevelthenettriggerprobabilityis149"?@ʍɵPc(L2)!W=Pc(hbb8[mht[top)!W=Pc(top)8+P(hbb)+P(mht)P(top\hbb)P(top\mht)P(hbb\mht)+P(hbb\mht\top)ɍ((3)!whereUUP(x)correspGondstotheprobabilityofeitherL2,themht,hbborthetoptermring.150Lev9el2jetterms:afrom3T*ableVIweseethatforv15triggerversion,:L2jetstermsareactuallysubsetsof151L1.OAsv-hereconditionalprobabilityisused,~citmeansthattheprobabilityofL2jettermsringifL1terms152redaisunity*.1Howeverainv16thePtrequirementofjetsinthersttriggertermwasloGosenedfrom8to6153GeVNandhArequirementon8GeVjetsinthethirdtriggertermwastightenedfromj[ٸjj<3:2htojjj<2:4.154As"intheL1case,UallL2jetsmatchingoineoneshadtheirturn-oncurvesparametrizedasfunctionsof155oine=jetpTL's,BWexceptfornoisejets,whosenumbGer=ineacheventwhichparatrizedasfuncionsofoineHtV.156T*urn-onUUcurvesforthesecasesarefoundinAppGendixB2.157Lev9elς2HT8term:$this.termconsistsofacutofHT
{>175GeV.forv15andHT>`100GeV.forv16).158CorrespGondentUUturn-oncurvesareshowninAppGendixB3.159Lev9el?26ET
Iterm:3thexcorrespGondent6ET	cutsare>10GeVxand>x20GeVforv15andv16respGectively*.160TheirUUturn-onareshowninAppGendixB4.161L2ASphericit9yT
erm:1this"termrequiresasphericitycutof>0.1.GCorrespGondingturn-oncurvesareshown162inUUAppGendixB5.163L2STT:DtheL2STTIPDeciencywasmeasuredforeventsinv16whichhavepassedtherestoftheL1,164L2}(L2topOR}L2hbb)andL3(exceptL3b-tag)triggerrequirementsandtheoinethreetovejetselec-165tion.Theםeciencywasmeasuredversustheinvqariantmassofthetwoleadingjets,/separatelyfor0,1,2166and3oinetightNNb-taggedevents,xinthethreedierentluminosityregions.AppGendixB6showsthe167STTIP(1,5.5,3)+eciencyversustheleadinginvqariantdi-jetmassinthelow,mediumandhighluminosity168rangeUUfordierentnumbGerofoineb-tags.169!C%ϐ2C.
^LevCel3170L3dconsistsofajetpartandab-tagone.F*orthejetpartofL3,gturn-oncurvesweredeterminedforevents171passingUUbGothL1andL2requirements.qCorrespondingprobabilityisgiventheequationbGelow172@ʍPc(L3)+=[Pc(3jetsUW)8+P(=2jetsUW)P(1noiseUUjet$q)+P(=1jetc)P(2noiseUUjets(c)+P(=0jetsUW)P(3noiseUUjets(c)]V8[Pc(2jetsUW)+P(=1jetc)P(1noiseUUjet$q)+P(=0jetsUW)P(2noiseUUjets(c)]ɍ((4)Ɏ!InrtheequationabGovertherstlinecorrespondstothetermJT(3,15,j[ٸj<3:6$),9thesecondtotheterm173JT(2,25,j[ٸj<3:6$).YxHerewasappliedthesametreatmenttoL3jetsmatchingoineonesandtonoisejets174asUUinL1andL2jetterms.qCorrespGondingturn-oncurvesareshowninAppGendixB1.175
Ecienciessfortheb-tagpartofL3weremeasuredintwodierentwaysdepGendingwhetherthetriggerlist176was
v15orv16.?YInthev15caseeventswererecordedwiththeJT2ff4JT20andJT2ff3JT12LffMM3ffVtriggers,177sinceI^theirL1andL2conditionswereexactlythesame.mEventswerefurtherrequiredtopasstherestofL3178conditionsYofJT2ff3JT15LffIPffVXYandYtheoineeventYselection.Inthev16caseecienciesweremeasured179inasimilarfashion,+butusingtriggerJT4ff3JT15LffVX(whichhasnoL2STTorL3BT*AGrequirements).180Events`werethenrequiredtohaveredoneofthethreeL2branchesofJT2ff3JT15LffIPffVXRandtopassthe181oineUUthreetovejetselection.qAllturn-oncurvesforbGothtriggerlistsarefoundinAppendixB8.182w2E12jўIV.zOBJECTIDENTIFICATION183InUUthissectionwedescribGethemainob8jectsusedinthisstudy:qǸ6qȵET,jetsandhadronictaucandidates.184!c%ںA.
^Taus185T*ausarereconstructedintheDdetectorfromenergyinthecalorimeterandoneormoretracks.Thetau186
P\reconstructionyalgorithmusesaconeofRʲ=n5u

cmex10p
n5fe*e	ˍ`
%2+8`
2:'l<0:5andaninnerconeofR<0:3isusedto187calculateUUtauisolationvqariables.188
F*orUUus,themostimpGortantdiscriminatingvqariablesfor!Dz-leptonsare[20
]:189poProleUU-iErb}1O
\cmmi5T+Erb}2Tɉfe$M.:#cmex7P
L@i<Eb}iύT"Q,whereE^ibT	istheETofthei^th`highestETtowerUUinthecluster.190Isolation,denedas&h2Eb}(0:5)E(0:3)2ʉfe3+Eb}(0:3)9Z,whereE(RDz)istheenergycontainedinay[;ofradiusRLaroundthe191
$calorimeterUUclustercentroid.192𐍍T*rackȒisolation,%adenedasscalarsumofthep^0bTHofnon-Ytracksina[;coneof0.5aroundthe193calorimeterUUclustercentroiddividedbysimilarsumfortracksassoGciatedwith!Dz.194g
SuchUUvqariablesarechosenbasedonthepGossibletaudecays:195electronUUormuon(߸!eeKKTor!\5),BR=35%.196singleUUchargedhadronandnoneutralhadrons(߸![ٟ^ڵ5),BR=12%.197singleUUchargedhadron+1neutralhadron(i.e.,߸!^M!([ٟ^0,+8[ٟ^ڲ)5),BR=38%.1983UUchargedhadrons+0neutralhadrons,BR=15%(so-called\3-prong"decays).199whichleadsusclassicatereconstructedtausintothreedierenttypGesdependingonthenumberoftracks200andUUelectromagnetic(EM)clusters[21
]:201
81.T9ypQe1:ocalorimeterT`cluster,"onematchedchargedtrackandnoassoGciatedEMTsubcluster.nMainly202߸![ٟ^ڵ5.203𐍍
82.T9ypQe2:bcalorimetercluster,onematchedchargedtrackandoneormoreassoGciatedEMsubclusters.204MainlyUU߸!^M![ٟ^0L[ٟ^ڵ5.205
83.T9ypQe3:[Mcalorimeter(`cluster,1^twoormorematchedchargedtracksandwithorwithoutEM(UsubGcluster.206MainlyUU߸![ٟ^ڵ[ٟ^[ٟ^+i([ٟ^0L)5.207g
InKrordertoprovideanoptimaltauidentication,threeNeuralNetworks(NNs)aretrainedtoidentifythe208threeUUtypGesofthetaus(1,2and3).209
TheeoutputoftheseNNsprovidesasetofthreevqariables(Fnnout=1,2,3)tobGeusedtoselectthetauin210the~event.\*ThetypGesroughlycorrespondtothe6Eleptondecaymodes.\*HighvqaluesofNNncorrespondtothe211physicalUUtaus,whilelowonesshouldindicatejetsmisidentiedastaus(fakes).212!c!B.
^Jets213JetsareidentiedusingtheRunIGIconealgorithm[22
]withconesizeofRB</ 0:5.-
ThejetalgorithmT42214[23
]]isranbGeforejetreconstructiontoremove]isolatedsmallenergydepositsduetonoise.Dstandardjet215qualityIcuts[24
]includeL1T*riggerinformation,
calorimeterelectromagneticfractionandcoarsehadronic216fraction.217
JetsusedinthisanalysisarerequiredtohaveatleasttwoprimaryvertextracksassoGciatedtothem218(vertexZconrmedjets).pItimpliesthatalthoughacalorimeterclusterisstillreconstructedasajet,itwill219bGe#Ddiscardedifithaslessthan2associatedPV#tracks.ۓInordertocorrecttheenergiesofreconstructed220jets\indataandMCIbacktoparton-levelenergies,weapplycertiedjetenergyscalecorrection(JES)[25
].221Additionally*,cjets`containingamuonwithRDz(;jet)O<0:5`fromab-quarkdecayarecorrectedtotakeinto222accountUUthemomentumcarriedawaybythemuonandtheneutrino[26
].223
[2E13jvyC.
^6hET224Presenceofneutrinosinaneventcausesanimbalanceofenergyinthetransverseplane(6qȵET).SXThisquantity225is	calculatedfromthetransverseenergiesofallcalorimetercellsthatpasstheT42algorithm,exceptthose226of
thecoarsehadroniclayers
duetohighnoiselevel.iHowever,they
areincludedinthecasethattheyare227clustered?withinareconstructedjet.jWThisraw6qȵETXiscorrectedfortheenergiesofotherob8jectslikephotons,228electrons,kvtaus3andjets.
KAsmuonsdepGositonlyasmallportionoftheirenergyinthecalorimeter,kvtheir229momentaUUissubtractedfromthe6qȵETvector.230!C%|6D.
^TheNeuralNetCworkb-taggingAlgorithm231
BeingLQCDLandWP+jetsthemainsourcesofbackgroundsinthisanalysis,requiringthepresenceof232atleastonejetcomingfromab-quarkisaverypGowerfulmethoGdofbackgroundrejection.*Theb-tagging233algorithm:eusedinthismeasurementisaNeuralNetwork(NN):*taggingalgorithmdevelopGedbytheb-ID234group[27
],whichcombines7characteristicvqariablesofSVT,JLIPandCSIPtaggingalgorithmsintothe235NNdiscriminant.2AsinthepreviousanalysiswehavechosentheopGeratingpointTIGHT,whichisequivqalent236to,requiringtheNN,discriminantoutputtobGegreaterthan0.775.dNBoththeaverageeciencyandfakerate237areUUcomparablebGetweenUUthisp20versionofthealgorithmandtheversionusedinp17[28
].238
Ea.
8bE-taggingZ"eciency
Indataweapplytheb-taggingalgorithmdirectlytojetsselectedinoursample.239InMCsuch\directtag"isnotdone.5InsteadwehavetoapplyacertaineciencytoMCsamples.5This240inclusive5!b-decayeciency(bD)ismeasuredindataanditistheproGductoftheprobabilitytotagab-jetin241anlMCUsample(^M,Cvb6)containinginclusivedecaysofthebquarktimesascalefactor.z
Thisdata/MCUscale242factorCisgivenbytheratioofdatasemileptoniceciency(^D7ATAvb!Ͳ)andaMC2semileptoniceciency(^M,Cvb!).243This9vscalefactor,?	thatmeasurestheeectonthetaggingratecausedbythedierencesintrackingbGetween244data5andMC,isthenusedtopropGerlyscaletheMC-derivedeciency*.gEItisassumedthatsuchfactorcould245bGeUUappliedtoanyMCtaggingeciency[27
].246
Eb.
8cE-taggingeciency
ItF;isassumedthatthesameproGcedureadoptedintheb-jetcaseisalsovqalidfor247c-jets,+namely*,a!c-jetscalefactor(^D7ATAvb!Ͳ)/(^M,Cvb!)multipliestheprobabilitytotagac-jetinanMC!sample248
(^M,Cvb6)UUtogetthec-taggingeciency*.249
Ec.
8Lightjettaggingeciency
Theصb-tagfakeratefromlightquarksiscomputedbymeasuringthe250negativetagrateasdenedin[29
].U0ThemethoGdusestsofb-,c-andlightjetstaggingratestobinneddata251combinediwithsamplecompGositionestimatedfromdata.BinnedNNioutput(NNout25)distributionsforb,nc252andUUlightjetsisttedtodatadistributionusingb-andc-jetecienciesprovidedbystandardbIDTRF's.253
Ed.
8T;aggability
b-tag\
algorithmcan'tbGeappliedtoanyjet,]butonlytheonesthatcontaintracks.Such254jetsearecalled\taggable"andaredenedbymatchingwithinRy<0.5toatrackjet,compGosedofat255least<Ftwotracks.imJustlikeb-tagging,AItaggabilityisdierentindataandMC,duetoimpGerfectsimulationof256trackingssystem."T*oaccountforthis,{taggabilityratefunctionsareappliedtoMCUevents."Suchfunctions257areparametrizedintermsofjetpTL,jetʲandprimaryvertexzp.TheywerederivedonthesingletoploGose258data{samples,wheretheisolationqualityoftheleptonisloGose.Thevqalidityofthesefunctionsistested259by[comparingobservedandpredictedtaggabilitytotightsamples.TheresultsshowagoGod[agreementas260describGedUUin[30
].261ݠ2E14jV.`ANALYSISOUTLINE262
Up~tothispGointwehavepresentedthedatasampleusedinthisanalysis(SectionIGIA)theMonteCarlo263samplesandcorrectionsappliedtothem(SectionsIGICandIID),thetriggerusedanditssimulation(Section264IGII)andtheob8jectIDmethoGd(SectionIV).INowwedescribGethenextstepsoftheanalysistowardsthenal265crosseUUsectionmeasurement:266Preselections(sectionVI):atleast4jets,{atleastonewithNN>0.3andpT	Fٵ>#10GeV/c,15GeVs2676qȵET	UU500GeVand6ET	signicance>4.0.268!Dz-} andb-ID}cuts(sectionVIGI):\atleastonegoodleptoncandidateandatleastonetightNN}b-tag269areUUrequired.270T*opGologicalhNNX(sectionVIIIB):Rafeed-forwardNN'sistrainedinordertoprovidesignal-background271separation.yThe>NN(wasoptimizedbytestingdierentsetsoftopGologicalvqariablesasitsinputsand272byUUapplyingdierent6qȵET	signicancecuts.273T*opGologicalPVariables(sectionIX):sectionshowingnalanalysisplotsoftopGologicalvqariablesof274interest.275CrossSection(sectionX)Thesignalfractiondeterminationiscombinedwithintegratedluminosity276measurementYtocalculatethecrosssection.@sSystematicuncertaintiesaredeterminedby
uctuatingthe277signicantQcompGonentsupanddownbyonestandarddeviationoneatatime,RPpropagatingitthrough278theUUentireproGcedure.279!C%VI.͹GPRESELECTION280
TheSYpreselectionistherststepoftheanalysis.qThecutspresentedherewerechoseninordertoprovide281thebGestbackgroundreductionandenhancethet'#btBcontentatthispGoint.dThecutsarethesimilartothose282usedinthep17analysis[3]exceptthatforthistimeweoptedtooptimizethevqalueof6qȵET	]signicancealong283withrthesetsofvqariablesweusedasinputstoNNrtraining(SectionVIGII).jCutsrshownbGelowwereapplied284toUUsamplesshowninT*ableVaswellastodataasshowninSectionIGIA.285Atleast4jetswithpT	>4:15GeVand<2.5,/withleading(inpTL)jetpT>4:35GeVandsecondand286thirdUUjetshaveUUpT	ε>25GeV287atUUleastonewwithNN>0.3andpT	ε>10GeV28815UUGeV6qȵET	500GeV2896qȵET	signicanceUU4.0290Noisolatedelectronormuon.ThisisdoneinordertoensureorthogonalitywithotherDmeasure-291ments/([31
]and[32])-events/thatpasstheleptonpreselectioncutsfromthesemeasurementswere292vetoGed.Also$eventsthatpasstheall-jetsanalysispreselectioncuts(describGedinthealljetanalysis293noteUU[33
])arerejectedhere.294
Amongf!allpreselectioncutsoneofthemrequiresamoredetaileddescriptionatthispGointsinceitrepresents295an^improvementupGontheoldp17analysis:6,ET
lsignicance.Missingtransverseenergysignicanceisa296measure;ofthelikelihoGod;of6sET
<arisingfromphysicalsources.BzItiscomputedfromcalculatedresolutions297ofphysicalob8jects(jets,electrons,muonsandunclusteredenergy)[3,34
].7Initiallyno6jET	Ӳsignicancewas298appliedneitheronMCnorondata.Inthisanalysiswedecidedtooptimizethe6ET
Vsignicancecutalong299withtheNNoptimizationitself.^Afternishingthe6ET
dsignicanceoptimizationpartwewentbackand300appliedtheoptimizedcutalongwiththenon-optimizedNNeleccutonlytoMC.Theentireoptimization301proGcedureUUisdescribedinSectionVIIIC.302
Indata,initiallythesamplecontainedapproximately650millioneventsandthenumbGerofpreselected303eventsUU(onceagain,without6qȵET	signicanceapplied)isapproximately2.8millionevents.304
AnotherrelevqantaspGectofthepreselectionistheusageofParticleSelector(onlyappliedtoMCsamples).305In
thisstepweaimedtoselectaparticulart'#bt	/nalstate,{namely*,we
splitWdecayintoW/!\e==Բand306tracked4separateecienciesforeachoftheseproGcesses.fInthisstepweselectedhadronicdecaysoftau,;Kand30782E15jatFthesameeventsFwheretaudecaysintoelectronsandmuonswereputintoe+jetsF߲and+jetsF߲samples.308AsUUinp17,wedecidedtodonotsplitthedileptonsampleindierentlepton
avors.309
BeforeproGceedingtothenextstep,itisimportanttodescribetheresultofthepreselectionintermsof310itsZ]ecienciessincealltherestofanalysisstronglydepGendsonthecutsappliedatthislevel.Aspreviously311describGed,;ֵt'#btwere5vgeneratedbyALPGEN.InALPGEN,dierentproGcesswithdierentnumbGersofpartons312have]dierentcross-sectionsandnumbGerofevents.XThisfactmustbGetakenintoaccountwhencalculating313the8meciencies,>5namely*,ecienciesmustbGeproperlyscaledtotheluminosity(4951.85pb^1
t)ofthesample.314T*ablesUUVIandIGIIUUshowthenumbGerbeforementionedfort'#btc!lepton+jetsandt'#bt!dileptonrespGectively*.315&dh.6ffY&h
ff{٘ProAcess
ffL#Tofev9ents&h
ff64cross-sectionT(pb)&h
ffʴalpgenTw9eight&h
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ffff뎎%+T:ABLETVIAI:tVۍ %t!lepton+jetsALPGENw9eights.<30h.6ffY&h
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T*ables_
IX,vX,XIandXIGIshowcut
owsforallpreselectioncutsappliedtodierentt'#bt
~decays(only316statisticalUUuncertaintiesareshown).317PYfӉffY"5SelectionksEv9entsRelativ9eŜCum9ulativeΉff(DInitialmw11164
\P9articleTselectoroǸ2412c21:6080:03T%821:6080:03T%DuplicateTev9entsremov|raloǸ2411c99:9880:01T%821:6080:03T%lPEv9entTqualityoǸ2315c96:0080:04T%820:7480:03T%JetTselectionoǸ1307c59:4580:09T%811:7080:03T%dV:ertexTselectionoǸ1296c99:1880:02T%811:6180:03T%ElectronTv9etooǸ1282c98:9380:01T%811:4980:03T%MuonTv9etooǸ1282c99:9380:01T%811:4880:03T%6]METTselectionoǸ1218c95:0580:05T%810:9180:02T%METTsignicancer772c63:3980:12T%̈6:9280:02T%NNTtaucutr394c53:5180:15T%̈3:7080:02T%ffO_T:ABLETIX:PreselectiontSaHWt!Ƽ7+8jetscut
o9w2E16bvፍhӉff/	Y 0SelectiongEv9entsARelativ9eCum9ulativeΉff/	&?Initialiѯ11164
P9articleTselectorl!4385Y39:2880:04T%ƒ39:2880:04T%DuplicateTev9entremov|rall!4383Y99:9680:01T%ƒ39:2680:04T%KEv9entTqualityl!4207Y95:9780:03T%ƒ37:6880:04T%JetTselectionl!1923Y45:7180:07T%ƒ17:2280:03T%_V:ertexTselectionl!1907Y99:2080:02T%ƒ17:0880:03T%ElectronTv9etol!1048Y54:9480:10T%9:3980:02T%0
MuonTv9etol!1047Y99:9580:01T%9:3880:02T%cXMETTselectionl!1002Y95:6480:05T%8:9780:02T%METTsignicancenq669Y66:7480:13T%5:9980:02T%NNTtaucutnq395Y59:1280:16T%3:5480:02T%ff/	OqT:ABLETX:PreselectiontSaHWt!Ƽe8+jetsTcut
o9wFvፍhӉff/	Y 0SelectiongEv9entsARelativ9eCum9ulativeΉff/	&?Initialiѯ11164
P9articleTselectorl!4367Y39:1280:04T%ƒ39:1280:04T%DuplicateTev9entremov|rall!4366Y99:9680:04T%ƒ39:1080:04T%KEv9entTqualityl!4189Y95:9580:03T%ƒ37:5280:04T%JetTselectionl!1990Y47:5280:07T%ƒ17:8380:03T%_V:ertexTselectionl!1975Y99:2380:02T%ƒ17:6980:03T%ElectronTv9etol!1967Y99:5980:01T%ƒ17:6280:03T%0
MuonTv9etol!1170Y59:4880:09T%ƒ10:4880:02T%cXMETTselectionl!1127Y96:3180:04T%ƒ10:0980:02T%METTsignicancenq812Y72:0680:11T%7:2780:02T%NNTtaucutnq186Y22:9580:13T%1:6780:01T%ff/	O#T:ABLETXI:PreselectiontSaHWt!Ƽ8+jetsTcut
o9wad)!Ӊff
oY 0SelectiongEv9entsRelativ9eCum9ulativeΉff
o&?Initiall!2799
P9articleTselectorl!2799Y100:0080:00T%2100:0080:00T%DuplicateTev9entremov|rall!2799Y100:0080:00T%2100:0080:00T%KEv9entTqualityl!2685FX95:9280:02T%͂95:9280:02T%JetTselectionnq145W5:4180:02T%ҭ5:1980:02T%_V:ertexTselectionnq144FX99:3280:03T%ҭ5:1680:02T%ElectronTv9etonq110FX76:1480:13T%ҭ3:9380:01T%0
MuonTv9etop83FX75:0880:16T%ҭ2:9580:01T%cXMETTselectionp80FX96:4580:08T%ҭ2:8480:01T%METTsignicancep60FX75:3280:19T%ҭ2:1480:01T%NNTtaucutp38FX63:2180:24T%ҭ1:3580:01T%ff
oOWLT:ABLETXIAI:PreselectiontSaHWt!Ƽl4q+8l;cut
o9w'2E17j
VIKI.DbʺANDĝSELECTIONS318
In3thenextstepweappliedtherequirementsoftight!Dz-andb-tagging.r`T*ableXIGII3showstheselection319criteriathatweappliedtodataandMC.Theb-tagopGeratingpointusedwasTIGHT,whichcorrespGonds320toENNbtag>0.775.lW*echosethegwiththehighestNNEasEthe&candidate.lAtthisstageoftheanalysis321weֵseparatedtheeventsdatasetwedealwithintoparts,
accordingtowhichtypGeof|thecandidatewith322highestaNN`bGelongs.ThiswasdoneprimarilytoseparatethetypGe3tauevents(whichareexpGectedto323havemuchhigherfakerateandthusweakert'#bt	ɲcrosssectionresult)fromthetypGe2events.Theseparate324measurementchannelswerelatercombinedtogetthenalresult(SectionX).Inprinciple,dtypGes1and2325shouldJbGeseparatedaswellbutasthereexistsaconsiderablecross-migrationbetweenJthem[20
]andtype3261isasmallfractionofthetotal(10%oftypGe1,I\54.5%oftypGe2and35.5%oftypGe3),I\theyweretaken327togetther8inthisanalysis.oThetopGologicalNNusedtoenhancethesignalcontent8isdescribedinsection328VIGIIBUU.329
At]thispGoint,weusedtheseIDEalgorithmstodene3mutuallyexclusiveandexhastivesubsamplesout330ofUUtheoriginalpreselecteddatasample:331The$\non-bveto"or\signal"sample-the,candidatehasNNO>0:90(NN	
YdenotestheNN
cut332commonlyrappliedtoalltaus)fortaustypGes1and2andNN(!Dz)q>0:95rfortaustypGe3,zXandatleast333onet)NNt"b-tag(asinT*ableXIGII).DTheset)NN(!Dz)cutswerechosenbasedonpreviousstudiesinvolving334hadronic8wdecaysoftaus[19
,>=37
>?].h(Thisisthesampleusedtoextractthecrosssection.Jetsmatchedto335wcandidatesUUarenotb-tagged,althoughttheystillcountasjets.336The
&\+vetosample"or\loGose-tight+sample"-Sameselection,7Zbutwith0:3s<NN<0:7
&forall337taus.h&RNN^lowercutof0.3insteadof0.0waschosentobiastheirjetpropGertiesclosertothoseof338tight5taucandidates,<0inparticular,sotheyhave5narrowshowers.gMTheuppGercutisat0.7andnot0.95339or40.90toreducesignalcontamination.dInthissample,l1400000eventswereusedforNN(trainingfor340taus*typGe1and2and600000eventswereusedinthecaseoftypGe3taus.EInbothcases,therestof341theUUsamplesservedasQCDtemplate.342Theo\bveto"sample-Requireexactly0tightb-tags.Thisisthecontrolsampleusedtoverifythe343vqalidityoftheQCDmoGdellingmethod.KThebvetorequirementimpliesthissampleisalmostpurely344background.345
AlongDwiththeNND4cutdescribGedabove,HDweDalsoappliedthecutNNelec>0.9onlytotype2taussince346thesearemorelikelytobGefakedbyelectrons.EThecutNNelec>0.9waschoseninordertomatchthelowest347cutUUofNNT>0.9appliedtotypGe2taus(SectionVII).348
AsbGothbandrIDuisthestepimmediatelyafterthepreselection,thenumberofeventsavqailableis2800000349million@events.jAsexplainedabGove1400000eventswereusedfortaustypGe1and2NN@
trainingand600000350fortypGe3tausNNtraining.Thus,\thereare1400000eventsavqailableineachsampleforthemeasurement351inh&thecaseoftypGes1and2and2200000inthecaseoftypGe3.:DetailsonNNh!trainingaregiveninSection352VIGIIB.353
TheUUQCDmoGdellingmethodusedhereisthesameasusedinp17andisdescribedinSectionIXAof[3].354
The_nalnumbGer_ofevents_ineachchannelforbGothsignalandbvetosamplesisshownonT*ablesXIV,355XV,UUXVIandXVIGI(onlystatisticaluncertaintiesareshown).356
As$cimpGortantasdeterminingthesubsamplestobeusedinthisanalysis,X&adeterminationaspreciseas357pGossibleڭofbothsignalandelectroweakڭcontaminationinthe\loGose-tighttsample"hadbGedoneinorder358to6knowwhetherthissampleistotallyQCD%dominatedornot..iNumbGersshowingthecompGositionofsuch359sampleTareshownonT*ablesXVIGIITandXIXwiththeirrespGectivestatisticaluncertainties.QF*romthet'#btbcontent360ineachcaseweareableestimatethesignalcontaminationintheloGose-tightsample.DSuchcontaminations361are?5.4%and3.0%fortaustypGe1and2andtypGe3respectivelywhenacrosssectionof7.46pbisassumed362(SectionIGIC).qLikewiseweseethatelectroweakcontaminationsare2.2%and0.9%.qAsthisisthesample363usedotomoGdeltheQCDFbackgroundbothsignalandelectroweakocontaminationsweretakenintoaccount364whenUUmeasuringthecrosssectioninSectionX.36572E18aЍ`45ffYFDZdataltaggingMC
	]F1ȴwithj@Lj<2:5andpmTJ>20GeVjͷF1ȴwithj@Lj<2:5andpmTJ>20GeV5gF1NNb-tag!mcw08eig@Lht,Tr7igWeight,bTagPr7ob,l
`umiR	,eWeightPVzI{R	,eWeight,bFr7agWeight$WZ}PtR	,ew08eig@LhtF4jetswithj@Lj<2:5andpmTJ>20GeVpF4jetswithj@Lj<2:5andpmTJ>20GeV)s0T:ABLEXIAII:b-taggingandID.IntheMC,w9eusetheb-taggingcertiedparameterizationratherthanactual
b-tagging,thaty)is,w9eappliedtheb-taggingweight.GW:ealsousedthetriggeringweightascomputedbythetriggereciencyparameterizationasw9ellasluminosityproleandPHVZ	reweightingweights. kmcw>eigRhtistheMCnormal-izationbfactors(toluminosit9y),vwhichbaredieren9tforMCbsampleswithdierentpartonmultiplicitiesinALPGENMCTsamples.	s&o fftiY-Sample!w#Tev9entsΉffti3Ldataw386
􍍑!mtSaHWt!Ƽ7+8jets~48.03T0.53!BtSaHWt!Ƽe8+jets~25.57T0.36!1^tSaHWt!Ƽ8+jets~3.21T0.14)1dtSaHWt!Ƽl4q+8l~4.01T0.07
WHbb8+jetsƾ!Tl&9+bb+jets~7.48T0.30ѼWHcc8+jetsƾ!Tl&9+cc+jets~4.68T0.17WHjjI+8jetsƾ!Tl&9+jjI+jets~5.66T0.11"Zbb8+jetsƾ!T7+bb+jets~0.93T0.08Zcc8+jetsƾ!T7+cc+jets~0.51T0.04xFZjjI+8jetsƾ!T7+jjI+jets~1.07T0.10gZbb8+jetsƾ!Tee+bb+jets~0.03T0.01۝Zcc8+jetsƾ!Tee+cc+jets~0.00T0.00EǼZjjI+8jetsƾ!Tee+jjI+jets~0.02T0.01Zbb8+jetsƾ!T+bb+jets~0.07T0.02ּZcc8+jetsƾ!T+cc+jets~0.02T0.01ZjjI+8jetsƾ!T+jjI+jets~0.01T0.01ۼZbb8+jetsƾ!Tq+bb+jets~0.08T0.03Zcc8+jetsƾ!Tq+cc+jets~0.00T0.00n;ZjjI+8jetsƾ!Tq+jjI+jets~0.04T0.01ffti~xT:ABLEmXIV:Finaln9umbAermofev9entsmineac9hchannelfortaustypAes1and2uafterb-tagging,IDmandtriggerin
theTsignalsamplewhentheassumedcrosssectionis7.46pb.pAnestimateofQCDbac9kgroundisnotincluded.s&o fftiY-Sample#Tofev9entsΉffti3Ldataw459
􍍑!mtSaHWt!Ƽ7+8jets~25.88T0.39!BtSaHWt!Ƽe8+jets~4.35T0.16!1^tSaHWt!Ƽ8+jets~3.43T0.14)1dtSaHWt!Ƽl4q+8l~2.80T0.06
WHbb8+jetsƾ!Tl&9+bb+jets~3.92T0.17ѼWHcc8+jetsƾ!Tl&9+cc+jets~3.26T0.15WHjjI+8jetsƾ!Tl&9+jjI+jets~4.08T0.11"Zbb8+jetsƾ!T7+bb+jets~0.74T0.07Zcc8+jetsƾ!T7+cc+jets~0.41T0.03xFZjjI+8jetsƾ!T7+jjI+jets~0.80T0.10gZbb8+jetsƾ!Tee+bb+jets~0.00T0.00۝Zcc8+jetsƾ!Tee+cc+jets~0.01T0.01EǼZjjI+8jetsƾ!Tee+jjI+jets~0.01T0.01Zbb8+jetsƾ!T+bb+jets~0.04T0.02ּZcc8+jetsƾ!T+cc+jets~0.01T0.01ZjjI+8jetsƾ!T+jjI+jets~0.00T0.00ۼZbb8+jetsƾ!Tq+bb+jets~0.12T0.04Zcc8+jetsƾ!Tq+cc+jets~0.19T0.04n;ZjjI+8jetsƾ!Tq+jjI+jets~0.06T0.01ffti~xT:ABLEXV:Finaln9umbAerofev9entsineac9hchannelfortaustypAe3߹Afterb-tagging,IDandtriggerinthesignal
sampleTwhentheassumedcrosssectionis7.46pb.pAnestimateofQCDbac9kgroundisnotincluded.P2E19S
~:p ffgY-Sample-#Tofev9entsΉffg3Ldataw2494
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WHbb8+jetsƾ!Tl&9+bb+jets4}9.29T0.27ѼWHcc8+jetsƾ!Tl&9+cc+jets~31.63T0.90WHjjI+8jetsƾ!Tl&9+jjI+jets~169.95T2.68"Zbb8+jetsƾ!T7+bb+jets4}1.30T0.11Zcc8+jetsƾ!T7+cc+jets4}3.15T0.20xFZjjI+8jetsƾ!T7+jjI+jets~16.86T1.14gZbb8+jetsƾ!Tee+bb+jets4}0.02T0.01۝Zcc8+jetsƾ!Tee+cc+jets4}0.00T0.00EǼZjjI+8jetsƾ!Tee+jjI+jets4}0.74T0.33Zbb8+jetsƾ!T+bb+jets4}0.08T0.02ּZcc8+jetsƾ!T+cc+jets4}0.07T0.03ZjjI+8jetsƾ!T+jjI+jets4}0.38T0.22ۼZbb8+jetsƾ!Tq+bb+jets4}0.10T0.03Zcc8+jetsƾ!Tq+cc+jets4}0.00T0.00n;ZjjI+8jetsƾ!Tq+jjI+jets4}1.36T0.49ffg~xT:ABLETXVI:b-v9etodatasetcompAositionfortypAes1and2Swhentheassumedcrosssectionis7.46pb.q~:p ffgY-Sample-#Tofev9entsΉffg3Ldataw3688
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WHbb8+jetsƾ!Tl&9+bb+jets4}5.26T0.19ѼWHcc8+jetsƾ!Tl&9+cc+jets~22.43T0.80WHjjI+8jetsƾ!Tl&9+jjI+jets~126.41T2.60"Zbb8+jetsƾ!T7+bb+jets4}0.92T0.09Zcc8+jetsƾ!T7+cc+jets4}2.86T0.20xFZjjI+8jetsƾ!T7+jjI+jets~14.53T1.15gZbb8+jetsƾ!Tee+bb+jets4}0.00T0.00۝Zcc8+jetsƾ!Tee+cc+jets4}0.08T0.04EǼZjjI+8jetsƾ!Tee+jjI+jets4}0.31T0.18Zbb8+jetsƾ!T+bb+jets4}0.04T0.02ּZcc8+jetsƾ!T+cc+jets4}0.05T0.02ZjjI+8jetsƾ!T+jjI+jets4}0.05T0.04ۼZbb8+jetsƾ!Tq+bb+jets4}0.16T0.05Zcc8+jetsƾ!Tq+cc+jets4}0.83T0.15n;ZjjI+8jetsƾ!Tq+jjI+jets4}2.31T0.46ffg~x#JT:ABLETXVIAI:b-v9etodatasetcompositionfort9ype3Swhentheassumedcrosssectionis7.46pb.fb2E20S
~:&o fftiY-Sample#Tofev9entsΉffti3Ldatax1217
􍍑!mtSaHWt!Ƽ7+8jets~32.94T0.48!BtSaHWt!Ƽe8+jets~17.02T0.34!1^tSaHWt!Ƽ8+jets~14.37T0.32)1dtSaHWt!Ƽl4q+8l~2.43T0.06
WHbb8+jetsƾ!Tl&9+bb+jets~6.33T0.23ѼWHcc8+jetsƾ!Tl&9+cc+jets~4.63T0.19WHjjI+8jetsƾ!Tl&9+jjI+jets~11.34T0.26"Zbb8+jetsƾ!T7+bb+jets~0.50T0.06Zcc8+jetsƾ!T7+cc+jets~0.58T0.06xFZjjI+8jetsƾ!T7+jjI+jets~1.10T0.13gZbb8+jetsƾ!Tee+bb+jets~0.01T0.01۝Zcc8+jetsƾ!Tee+cc+jets~0.01T0.01EǼZjjI+8jetsƾ!Tee+jjI+jets~0.00T0.00Zbb8+jetsƾ!T+bb+jets~0.03T0.01ּZcc8+jetsƾ!T+cc+jets~0.04T0.01ZjjI+8jetsƾ!T+jjI+jets~0.02T0.01ۼZbb8+jetsƾ!Tq+bb+jets~1.07T0.17Zcc8+jetsƾ!Tq+cc+jets~0.57T0.10n;ZjjI+8jetsƾ!Tq+jjI+jets~0.36T0.04ffti~x	T:ABLETXVIAII:loose-tigh9tdatasetcompositionfort9ypes1and2Swhentheassumedcrosssectionis7.46pb.q~:&o fftiY-Sample#Tofev9entsΉffti3Ldatax4733
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WHbb8+jetsƾ!Tl&9+bb+jets~8.95T0.27ѼWHcc8+jetsƾ!Tl&9+cc+jets~7.80T0.23WHjjI+8jetsƾ!Tl&9+jjI+jets~16.32T0.30"Zbb8+jetsƾ!T7+bb+jets~0.52T0.05Zcc8+jetsƾ!T7+cc+jets~0.46T0.04xFZjjI+8jetsƾ!T7+jjI+jets~1.16T0.12gZbb8+jetsƾ!Tee+bb+jets~0.00T0.00۝Zcc8+jetsƾ!Tee+cc+jets~0.00T0.00EǼZjjI+8jetsƾ!Tee+jjI+jets~0.01T0.01Zbb8+jetsƾ!T+bb+jets~0.06T0.01ּZcc8+jetsƾ!T+cc+jets~0.07T0.01ZjjI+8jetsƾ!T+jjI+jets~0.11T0.02ۼZbb8+jetsƾ!Tq+bb+jets~2.49T0.24Zcc8+jetsƾ!Tq+cc+jets~1.90T0.14n;ZjjI+8jetsƾ!Tq+jjI+jets~1.28T0.08ffti~x>T:ABLETXIX:loAose-tigh9tdatasetcompositionfort9ype3Swhentheassumedcrosssectionis7.46pb.vf2E21jz\VIKII.ÄNEURALNETWCORKANALYSIS366A.
^VariablesforNNtraining367F*ollowingmthesameproGcedureasinthepreviousanalysis,5wedeterminethecontentofsignalandbackground368inthepreselectedsample,-increasesignal/backgroundrateandfromthis,measurethecross-section.wThe369proGcedureadoptedinthep17analysiswasfeedasetoftopologicalvqariablesintoanarticialneuralnetwork370inordertoprovidethebGestpossibleseparationbetweensignalandbackground.Asbefore,thecriteriafor371choGosing!Xsuchvqariableswere:	pGowerofdiscriminationand!Dz-uncorrelatedvqariables.Thesetispresented372bGelow:373릍HT	-UUthescalarsumofalljet'spT(hereandbGelowincludingwleptoncandidates).374D6
ET]IF
C

cmbxti10Isignici>anceM-AsbGeingthevqariablethatprovidesthebestsignal-backgroundseparationwe375decidedUUtooptimizeit.376IAplanarityb"[35
]UU-thenormalizedmomentumtensorisdenedas377֍ױvM="ԍKPop^o;Zir}p^o;ZjK^fe#Z񍍑YPAo^j[q!Bɵp^o
j((5)&S-where'!#ٍp^0ٲisthemomentum-vectorofareconstructedob8jectoandiandjVparecartesiancoGordinates.378F*romVthediagonalizationofMwendthreeeigenvqalues1C23withVtheconstraint1+;|2+3C=3791.:TheIaplanarityA7isgivenbyA=|3|&fes2	"3andmeasuresthe
atnessofanevent.:Hence,itisdened380intherange0v̸M0:5.LargevqaluesofAcorrespGondtomoresphericalevents,liket'#bt[3eventsfor381instance,sincedtheyaretypicalofdecaysofheavyob8jects.GwOntheotherhand,bGothQCDDandW+;jets382eventsUUaremoreplanarsincejetsintheseeventsUUareprimarilyduetoinitialstateradiation.383ISphericity[35
]2-bGeingdenedasS.=e3e&fes2
*(2;+ȵ3|s),andhavingarange0ܸSD1:0,sphericity2isa384measurerofthesummedp^2v?
2ܲwithrespGecttotheeventraxis.XInthissensea2-jetseventrcorrespondsto385Sv|i
0andanisotropiceventSi
1.It'#btReventsareveryisotropicastheyaretypicalofthedecaysof386heavyob8jectsandbGothQCDandWi+Ujets+eventsarelessisotropicduetothefactthatjetsinthese387eventsUUcomeprimarilyfrominitialstateradiation.388@jITopandWaPImasslikelihoi>od-a^2|s-likevqariable.gL@`텍mM3j#mtmŭfemʟt/`5ݱ2=+:`텍/QM2j#MmW/Qŭfe$gx̴mW0`6ݱ2;?S,where389mtV;MW	;t;W
3MarehtopandW5masses(172.4GeVand81.02GeVrespGectively)andresolutionvqal-390ues(19.4GeVand8.28GeVrespGectively).#M3jNandM2jareinvqariantmassescompGosedofthejet391combinations.qW*eUUchoGosecombinationthatminimizesL.392ICentri>ality,UUdenedasHmT7feWQHmEha,whereHE
²issumofenergiesofthejets.393cos&c(G)-Theanglebetweenthebeamaxisandthehighest-pT	Ijetintherestframeofallthejetsin394theUUevent.395s0p#s0fe㏟Ѝ(&㐵s)UU-TheinvqariantUUmassofalljetsand!Dzsintheevent.396릍
ThechosenvqariablesareintheendaconsequenceofthemethoGdemployedinthisanalysis:useevents397frommtheQCD-enrichedloGose-tightsampletomoGdelQCDmeventsinthesignal-richsample,t
anduseab-tag398vetoUUsampleasanindepGendentcontrolsampletocheckthevqalidityofsuchbackgroundmoGdeling.399!)<B.
^TopKologicalNN400
F*ortrainingtheNeuralNetworkweusedtheMultilayerPerceptronalgorithm,asdescribGedin[38
].As401explainedbGeforeinSectionVII,therst1400000eventsinthe\loose-tight"samplewereusedasbackground402forhNN\trainingfortaustypGes1and2,andtherst600000ofthesamesampleforNNtrainingfortypGe3403taus.ThisameansthatdierenttautypGesarebeingtreatedseparatelyinthetopologicalNN.Inbothcases404k2E22j1/3foftheAlpgensampleoft'#btO!ݵ\+jetswasusedforNN5trainingand2/3ofitforthemeasurement.405Whendoingthemeasurementlateron(SectionX)wepickthetauwiththehighestNN(!Dz)inthesignal406sample|asthetaucadidateatsametimethattausintheloGose-tightsamplearepickedatrandomsinceall407ofthemareregardedasfaketausbybGeingbelowthecutNN(!Dz)=0.7.HBydoingthisweexpGecttoavoid408anybiaswhenselectingrealtausforthemeasurement.VFigures3and4showtheeectofeachofthechosen409theUUtopGologicaleventUUNNinputvqariablesonthenaloutput.410
FiguresP5and6showtheNNDoutputasaresultofthetrainingdescribGedabove.ItPisevidentfromboth411picturesUUthathighvqaluesofNNcorrespGondtothesignal-enrichedregion.4125@#MSPSfile="plots/SetI_NNout_SM_type2_tauQCD.eps" llx=0 lly=0 urx=567 ury=384 rwi=3402 FIG.3:
T:rainingoftopAologicalNeuralNet9workoutputfort9ype1and2c9hannel._Upperleft:
relativ9eimpactof
eac9hoftheinputv|rariables;uppAerright: topAologicalstructure;lowerright: nalsignal-backgroundseparationofthemethoAd;Tlo9werleft:pconvergencecurves.2E23GD/@#MSPSfile="plots/SetI_NNout_SM_type3_tauQCD.eps" llx=0 lly=0 urx=567 ury=384 rwi=3402 FIG.N4:&T:rainingoftopAologicalNeuralNet9workNoutputfort9ype3Vc9hannel.ȁUpperleft:&relativ9eimpactofeachof
the@inputv|rariables;uppAerrigh9t:ftopologicalstructure;lo9wer@right:fnalsignal-backgroundseparationofthemethoAd;lo9werTleft:pconvergencecurves.=\RPSfile="CONTROLPLOTS/Std_TypeI_II/nnout.eps" llx=0 lly=0 urx=567 ury=413 rwi=2835 RǷFIG.T5:pThetopAologicalNeuralNet9workToutputfort9ype1and2Sc9hannelg2E24G=\QPSfile="CONTROLPLOTS/Std_TypeIII/nnout.eps" llx=0 lly=0 urx=567 ury=413 rwi=2835 _FIG.T6:pThetopAologicalNeuralNet9workToutputfort9ype3Sc9hannel돺C.
^NNoptimization413
OneLdierencebGetweenLthispresentanalysisandthepreviousp17isthatwepGerformedaNN,optimization414alongWwitha6 ET
signicanceoptimization.y~Previouslyacutof>3.0wasappliedto6ET
signicanceat415the
preselectionstageandthenitwasincludedasoneofthevqariablesforNNtraining.Thistimeaswe416chose]tooptimizeit,_sinceitisstillagoGod]vqariabletoprovidesignal-backgrounddiscrimination(Figure7).417It`isimpGortanttostressoutthataftertheoptimizationwepGerformedtheanalysiswiththeoptimized6/ET418signicancecutappliedwhendoingbGoth.andbID(SectionVII),qthereforeafterthepreselectionwhereno4196qȵET	signicance>cutwasapplied.jMW*ethenwentbackanpreproGcessed(preselected)allMC>sampleswiththe420optimized_cut.Bothresults,!with6`,ET
1signicanceappliedduringandafterpreselectiowereidentical.W*e421then
chosetopresentthisanalyiswiththiscutappliedatthepreselectionlevelinordertohaveaconsistent422cutUU
owthroughouttheanalysis(SectionVI).423Ͷፍ\CPSfile="plots/metl_allEW.eps" llx=0 lly=0 urx=567 ury=381 rwi=2835 iFIG.T7:p6|rET:signicancedistributionforsignalandbac9kgrounds.[2E25j
BelowUUwedescribGehowwesplitthispartoftheanalysisintotwoparts:424w
81.Setoptimization:W*e'|appliedanarbitrarycuton6ET
t2signicanceof4.0andvqariedthesetof425vqariblesUUgoingintoNNtraining426|r
82.6qȵET
signicanceVoptimization:lAfterKchosingthebGestsetbasedonthelowestRMS,wethenvqaried427theUU6qȵET	signicancecut428w
F*orqvthispartoftheanalysiswepresentthesetsofvqariablesthatweretakenintoaccounttopGerformthe429NNUUtraning430x䍍ISet$I²:UUHTL,aplan(aplanarity),sqrts(pUWfe3荵s
W)431ISet$II²:UUHTL,aplan,cent(centrality)432ISet$III²:UUHTL,aplan,spher(spherecity)433ISet$IV2":UUHTL,cent,spher434ISet$V2":UUaplan,cent,spher435ISet$VI²:UUHTL,aplan,sqrts,spher436ISet$VII²:UUHTL,aplan,sqrts,cent437ISet$VIII²:UUHTL,aplan,sqrts,costhetastar(cos(G^)438ISet$IX²:UUHTL,aplan,sqrts,cent,spher439ISet$X²:UUHTL,aplan,sqrts,cent,costhetastar440ISet$XI²:UUHTL,aplan,sqrts,spher,costhetastar441ISet$XII²:UUmetl,HTL,aplan,sqrts442ISet$XIII²:UUmetl,HTL,aplan,cent443ISet$XIV2":UUmetl,HTL,aplan,spher444ISet$XV2":UUmetl,HTL,cent,spher445ISet$XVI²:UUmetl,HTL,aplan446ISet$XVII²:UUmetl,HTL,sqrts447ISet$XVIII²:UUmetl,aplan,sqrts448ISet$XIX²:UUmetl,HTL,cent449ISet$XX²:UUmetl,HTL,aplan,sqrts,cent450ISet$XXI²:UUmetl,HTL,aplan,cent,spher451ISet$XXII²:UUmetl,HTL,aplan,sqrts,spher452ISet$XXIII²:UUmetl,HTL,aplan,sqrts,costhetastar453ISet$XXIV2":UUmetl,sqrts,cent,spher,costhetastar454ISet$XXV2":UUmetl,HTL,cent,spher,costhetastar455ISet$XXVI²:UUmetl,aplan,cent,spher,costhetastar456ISet$XXVII²:UUmetl,HTL,aplan,cent,costhetastar457ISet$XXVIII²:UUHTL,aplan,topmassl458ISet$XXIX²:UUHTL,aplan,sqrts,topmassl4592E26jISet$XXX²:UUHTL,aplan,sqrts,cent,topmassl460ISet$XXXI²:UUHTL,aplan,sqrts,costhetastar,topmassl461ISet$XXXII²:UUmetl,HTL,topmassl,aplan,sqrts462ISet$XXXIII²:UUmetl,spher,costhetastar,aplan,cent463
TheUUcriteriausedformakingadecisiononwhichvqariableshouldbGeusedfollow:464Nomorethan5vqariablestokeepNNsimpleandstable.ZMorevariablesleadstoinstabilities(dierent465resultUUaftereachretraining)andrequirelargertrainingsamples.466W*eUUdonotwantUUtousehighlycorrelatedvqariablesinsameNN.467W*eUUwanttousevqariableswithhighdiscriminatingpGower.468
InordertomakethedecisionabGoutwhichofthese11choicesistheoptimalwecreatedanensembleof46920000)pseudo-datasetseachcontainingeventsrandomly(accordingtoaPoissondistribution)pickedfrom470QCD,5EWandt'#btHtemplates.JgEachofthesedatasetswastreatedlikerealdata,meaningapplyingallthecuts471andMdoingtheshapGetofeventMtopologicalNN.QCD&templatesfortweremadefromthesame\loose-tight472?Esample"~fromwhichtheQCDocompGonentofthe\data"wasdrawn._*Thegureofmeritchosenisgivenby473EquationUU6bGelow:474C܍|µfڧ=<$K(Nfit
A8Ntr7ue)Kwfe?)	(֍ѵNtr7ue((6)whereNfitƲisthenumbGeroft'#btKvpairsgivenbythetandNtr7ueisthenumbGeroft'#btKvpairsfromthePoisson475distribution._PInbGothSetand6ET	9signicanceoptimization,NthelowestRMSnwasusedtocaracterizewhich476congurationUUisthebGestineachcase.477
TheAplotsshowingresultsconcerningthesetoptimizationsarefoundinAppGendixEandaresummarized478inT*ableXXbGelow,$whereeachRMSandmeanareshown.5HF*orNNtrainingisstandardtochoGosethenumbGer479ofhiddennoGdesasbeingtwicethenumbGerthenumbGerofvqariablesusedforthetraining.aTheparenthesis480afterUUeachsetIDshowthenumbGerofhiddennodesinNNtraining.481
F*romaTableXXweseethatSetIahasthelowestRMS,thuswechoseitasthesettobGeusedin61kET482signicanceoptimizationpart,whoseresultsareshowninAppGendixFandthensummarizedinT*ableXXI483bGelow484
CombinedresultsfromT*ablesXXandXXIshowthatthebGestcongurationfoundwasSetIwith6qȵET	Osig-485nicance4.0.W=Therefore,thiswasthecongurationusedtopGerformthecross-sectionmeasurement.Figure4868UUshowsthevqariationoftheRMSasfunctionofthe6qȵET	signicanceweapplied.487Yލy
CPSfile="plots/METsig-RMS.eps" llx=0 lly=0 urx=567 ury=439 rwi=2268 lFIG.T8:pPlotofRMSasafunctionthe6|rET:signicanceappliedޠ2E27&6*卍DsKff7Y&h
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paren9thesisTreferstonumbAerofhiddennodesineac9hcase.2E286f\CPSfile="plots/gaus_ttbar.eps" llx=0 lly=0 urx=567 ury=380 rwi=2835 79FIG.T9:pDistributionoftheoutput\measuremen9t"foranensemblewith116.9tVۍ %tzevents.v፟\APSfile="plots/pull1-40.eps" llx=0 lly=0 urx=567 ury=381 rwi=2835 sXFIG.T10:pTheensem9bletest'spull.
InlordertochecklthevqalidityofouremsembletestsproGcedure,itisinstructivetoplotbGoththedistribution488ofUUthepredictednumbGerUUoft'#btDzandwhatiscalled\pull",denedinEquation7below:489C܍5p=<$K(Nfit
A8Ntr7ue)Kwfe?)	(֍)˵fit((7)>]whereUUfit^istheerroronthenumbGerUUoft'#btDzpairsgivenbythet.490
FiguresUU9and10showbGothbeforementioneddistributions.491
F*rom}Figure9weseeagoGod}agreementbGetweenthenumbGeroft'#btBpairsinitiallysetintheensembleand492the	measuredvqalue.AndFigure10showsanicegaussiancurve,vthatindicatesagoGod	behaviour	ofthet493uncertaintiesUUintheensembles.494%2E29jIX.>+TOPOLOGICALVARIABLES495
InԚthissectionweshowplotsofthetopGologicalvqariablesusedinthisanalysisinordertocheckthe496agreementjbGetweendataandMonteCarloinallcases.Plotsareseparatedintwokinds:!signalsampleand497b-vetoUUcontrolplots.498!C%A.
^Signalsampleplots499
AsstatedinSectionVIGIthesignalsampleistheoneweusedtoperformthemeasurement.]>Thecutshere500consistuofNN(!Dz)
>0:90ufortaustypGes1and2,}
NN()
>0:95ufortaustypGe3,}
andatleastoneNNub-tag.501This#GsamplecontainsagoGod#Gamountoft'#bt(19.7%fortypGes1and2and8.6%fortypGe3)asshowninT*ables502XIV^andXV.NextweshowtheplotsofthetopGologicalvqariablesforthissample.Theerrorbarsrepresent503theUUstatisticaluncertaintiesonly*.504㵍'RPSfile="CONTROLPLOTS/Std_TypeI_II/aplan.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNOPSfile="CONTROLPLOTS/Std_TypeI_II/ht.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'QPSfile="CONTROLPLOTS/Std_TypeI_II/cent.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNRPSfile="CONTROLPLOTS/Std_TypeI_II/spher.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.:'11:ThetopAologicalv|rariablesinthesignalsample(B&t9ypes1and2).aTheKolmogoro9v-Smirnov:'(KS)9probabilities
areTsho9wn,indicatingthelevelofagreement.2E30܍ON'RPSfile="CONTROLPLOTS/Std_TypeI_II/sqrts.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNYPSfile="CONTROLPLOTS/Std_TypeI_II/costhetastar.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'QPSfile="CONTROLPLOTS/Std_TypeI_II/metl.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNPPSfile="CONTROLPLOTS/Std_TypeI_II/met.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.:'12:ThetopAologicalv|rariablesinthesignalsample(B&t9ypes1and2).aTheKolmogoro9v-Smirnov:'(KS)9probabilities
areTsho9wn,indicatingthelevelofagreement.Q܍ON'QPSfile="CONTROLPLOTS/Std_TypeIII/aplan.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNNPSfile="CONTROLPLOTS/Std_TypeIII/ht.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'PPSfile="CONTROLPLOTS/Std_TypeIII/cent.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNQPSfile="CONTROLPLOTS/Std_TypeIII/spher.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.S13:ThetopAologicalv|rariablesinthesignalsample(Rt9ypes3).	pTheKolmogoro9v-SmirnovS(KS)Dprobabilitiesare
sho9wn,Tindicatingthelevelofagreement. 2E31܍ON'QPSfile="CONTROLPLOTS/Std_TypeIII/sqrts.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNXPSfile="CONTROLPLOTS/Std_TypeIII/costhetastar.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'PPSfile="CONTROLPLOTS/Std_TypeIII/metl.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNOPSfile="CONTROLPLOTS/Std_TypeIII/met.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.S14:ThetopAologicalv|rariablesinthesignalsample(Rt9ypes3).	pTheKolmogoro9v-SmirnovS(KS)Dprobabilitiesare
sho9wn,Tindicatingthelevelofagreement. "2E32jݏB.
^b-vCetocontrolsampleplots505
TheSb-vetosampleistheoneusedtotestourQCDSmoGdellingVII.m'AsitrequiresnoNNSb-tagsitis506QCD-dominated:Kandhasatinyamountoft'#btֽ(1.9%fortypGes1and2and0.7%fortypGe3)asshownin507T*ablesXVIandXVIGI.)ItconsistsofanidealsampletomakesurethattheQCDmodellingworksandcan508bGeIusedinthemeasurement.mNextweshowtheplotsofthetopGologicalvqariablesforthissample.mTheerror509barsUUrepresentthestatisticaluncertaintiesonly*.510㵍'TPSfile="CONTROLPLOTS/bveto_TypeI_II/aplan.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNQPSfile="CONTROLPLOTS/bveto_TypeI_II/ht.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'SPSfile="CONTROLPLOTS/bveto_TypeI_II/cent.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNTPSfile="CONTROLPLOTS/bveto_TypeI_II/spher.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.f]15:ThetopAologicalv|rariablesintheb-v9etocontrolsample(n\typAes1and2).TheKolmogorov-Smirnov(KS)
probabilitiesTaresho9wn,indicatinghowgoAodTtheagreementis.!ɠ2E33܍ON'TPSfile="CONTROLPLOTS/bveto_TypeI_II/sqrts.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kN[PSfile="CONTROLPLOTS/bveto_TypeI_II/costhetastar.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'SPSfile="CONTROLPLOTS/bveto_TypeI_II/metl.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNRPSfile="CONTROLPLOTS/bveto_TypeI_II/met.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.f]16:ThetopAologicalv|rariablesintheb-v9etocontrolsample(n\typAes1and2).TheKolmogorov-Smirnov(KS)
probabilitiesTaresho9wn,indicatinghowgoAodTtheagreementis.Q܍ON'SPSfile="CONTROLPLOTS/bveto_TypeIII/aplan.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNPPSfile="CONTROLPLOTS/bveto_TypeIII/ht.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'RPSfile="CONTROLPLOTS/bveto_TypeIII/cent.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNSPSfile="CONTROLPLOTS/bveto_TypeIII/spher.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.917:eThetopAologicalv|rariablesintheb-v9etocontrolsample(AtypAes3).TheKolmogorov-Smirnov(KS)9proba-
bilitiesTaresho9wn,indicatinghowgoAodTtheagreementis."W2E34܍ON'SPSfile="CONTROLPLOTS/bveto_TypeIII/sqrts.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNZPSfile="CONTROLPLOTS/bveto_TypeIII/costhetastar.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 'RPSfile="CONTROLPLOTS/bveto_TypeIII/metl.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 kNQPSfile="CONTROLPLOTS/bveto_TypeIII/met.eps" llx=0 lly=0 urx=567 ury=413 rwi=1927 FIG.918:eThetopAologicalv|rariablesintheb-v9etocontrolsample(AtypAes3).TheKolmogorov-Smirnov(KS)9proba-
bilitiesTaresho9wn,indicatinghowgoAodTtheagreementis.#2E35j[X.&ECRCOSSSECTION511
Having#presentedthepreselectionyeldsonSectionVIwenowshowtheresultsoftheecienciesfor7ID,512b-taggingUUandtriggerforallt'#btDzchannels513%^4şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID-22:2080:24j:22:2080:24
yTT:rigger,84:5480:55he18:7780:22b-tagging,61:8280:55he11:6180:16ffW%#gT:ABLETXXIAI:tSaHWt!Ƽ7+8jetsnalcut
o9wfortaustypAes1and234şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID-12:3780:21j:12:3780:21
yTT:rigger,84:7980:75he10:4980:19b-tagging,59:6380:75jd6:2680:13ffWtraT:ABLETXXIAII:tSaHWt!Ƽ7+8jetsnalcut
o9wfortaustypAe34şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID-10:8180:20j:10:8180:20
yTT:rigger,83:4080:81jd9:0280:18b-tagging,61:3080:82jd5:5280:12ffWfMT:ABLETXXIV:tSaHWt!Ƽe8+jetsTnalcut
o9wfortaustypAes1and2B损vݍ4şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID/2:2580:11l2:2580:11
yTT:rigger,83:6281:77jd1:8880:09b-tagging,58:2681:76jd1:1080:06ffWv7T:ABLETXXV:tSaHWt!Ƽe8+jetsTnalcut
o9wfortaustypAe3Mbvݍ4şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID/3:3880:19l3:3880:19
yTT:rigger,84:4482:13jd2:8680:17b-tagging,61:2582:16jd1:7580:11ffWdb.T:ABLETXXVI:tSaHWt!Ƽ8+jetsTnalcut
o9wfortaustypAes1and2.vݍ4şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID/3:8880:21l3:8880:21
yTT:rigger,82:7982:04jd3:2180:18b-tagging,58:1182:05jd1:8780:11ffWrT:ABLETXXVIAI:tSaHWt!Ƽ8+jetsTnalcut
o9wfortaustypAe3vݍ4şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID-21:1880:37j:21:1880:37
yTT:rigger,79:5680:90he16:8580:34b-tagging,62:8380:92he10:5980:25ffWbT:ABLETXXVIAII:tSaHWt!Ƽdil&9eptonnalcut
o9wfortaustypAes1and2$L2E36bvݍ4şωffWY9Selection.Relativ9e(%)cCum9ulative(%)ΉffWSID-14:7380:34j:14:7380:34
yTT:rigger,78:7881:08he11:6080:30b-tagging,63:6281:11jd7:3880:22ffW%#sNT:ABLETXXIX:tSaHWt!Ƽdil&9eptonnalcut
o9wfortaustypAe3.
Afterhavingcomputedallecienciesitisworthytosummarizeallofthem(in%)forthedierenttau514typGes:515+7Hd@u ff
@]YoChannel<GHPreselection茼SID{T:riggerNb-tagΉff
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􍍑tSaHWt!Ƽe8+jets>pn3:5480:02pG10:8080:209:0280:18ܾ5:5380:12
ütSaHWt!Ƽ8+jets>pn1:6780:01sF3:3880:192:8680:17ܾ1:7580:11tSaHWt!Ƽdil&9epton>pn1:3680:01pG21:1880:3716:8580:34n10:5980:25ff
@]*nT:ABLETXXX:Summaryofallselectionsfortaust9ypAe1&2.9ft ff_YoChannel<GHPreselection茼SID{T:riggerb-tagΉff_oFtSaHWt!Ƽ7+8jets>pn3:7080:02pG12:3780:2110:4980:19n6:2680:13
􍍑tSaHWt!Ƽe8+jets>pn3:5480:02sF2:2580:111:8880:09n1:1080:06
ütSaHWt!Ƽ8+jets>pn1:6780:01sF3:8880:213:2180:18n1:8780:11tSaHWt!Ƽdil&9epton>pn1:3680:01pG14:7380:3411:6080:30n7:3880:22ff_vQT:ABLETXXXI:Summaryofallselectionsfortaust9ypAe3.N9
T*ableUUbGelowsummarizesthenumbGerofeventsineachchannelafternalselection.516@^T:ABLETXXXIAI:Finaln9umberTofev9entsTinthet9woTanalysisc9hannels.K?=#?>'ffXevYT%St9ypAeTI,IIjGSt9ypAeTI,II(tted)˰St9ypAeTIII
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􍍑ptSaHWt!Ƽ7+8jetsO]72.04T0.5338.82T0.39O1tSaHWt!Ƽe8+jetsO]38.35T0.36o6.52T0.16MtSaHWt!Ƽ8+jetsQ\4.81T0.14o5.14T0.14StSaHWt!Ƽl4q+8lQ\6.02T0.07o4.20T0.06BtSaHWtlototalTMC$121.22T0.43B54.68T0.20tSaHWtlototalTtted5%133.04T17.0933.12T15.04
WH+jetsO]17.82T0.3311.26T0.23Z+jetsQ\2.78T0.14o2.39T0.12LQCD5%232.35T17.09412.22T15.04SignalTsignicance86.77&y1.54S/BTratio80.52&y0.08%?2E37j
Thecrosssectionwasmeasuredbyminimizingthesumofthenegativelog-likelihoGodfunctionsforeach517binVofbGoththetypes1and2channelandthetypGe3channel.ThesearefunctionsusedbyMINUIT=to518pGerform9tsshowninFigs5and6inSectionVIIIB.LiButthereLwasfunctionoff(QCD)andnowwewant519toUUuseittomeasurethecrosssection,sowemustexpressitintermsof[ٲ(t'#btR):520L(͠;x䍑~Ni
׵;Nobsi)l2`og[ٲ(Ytii<$x䍑O~N;Nr,obsi;Yiwfe=	fϵN:obs;Zi!,ߵe;1~Ni@~)((8)!Hwherex䍑R~mHNi=ġhȵBqR|L(t'#btr)i+Nbk+Bg#ismHnumbGereventspredictedinbiniofthedataNNm
distributionandN^obs;Zi521isbtheactualcountobservedinthatbin.RThecross-sectionisthentheminimumvqalueofeachfunction.RBut,522as2stressedoutinSectionVIGI,9wehavetotakeintoaccountbGothsignal(t'#bt)andelectroweakcontamination523inktheloGose-tightsampleweusetomoGdelQCDkinthehighNNregionusedforthemeasurement.:The524electroweakjcompGonentissmallandthereforeitiskeptxedduringthetandsubtractedfromtheloGose-525tightgsample.SHowever,
dasdicussedbGefore,thenumbGersforsignalcontaminationare5.4%and3.0%fortaus526typGes6B1and2andtypGe3respectivelywhenweassumedat'#btҴcrosssectionof7.46pb.glThismeansthat5.4%527(12.55events)of232.35QCDeventsfortaustypGes1and2areactuallyt'#bt	`eventsand3.0%(12.37events)528of412.22QCDkeventsfortaustypGe3areactuallyt'#bt	events.\E12.55and12.37eventsrepresentincreasesof5299.43%'iand37.35%onthenumbGer'iofsignalevents'ifortypes1and2andtype3respectively*.bxHowever'ithisis530note
thenalmeasurementyetsincethecross-sectionmeasurementonlymakessenseifthecross-sectionwe531measure{intheandisthesameastheonewehaveassumedtonormalizet'#btKMC{samples.TThismeansthat532wed	hadtoiteratebackbynormalizingthesignalsamplesuntilwefoundaconvergenceofthecross-section.533T*ableUUXXIGIIsummarizestheiterationprocess.534
ǟcffY&h
ff٘AssumedTR(tVۍ %teS)(pb)
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ffsignalTcon9taminationfortypAe3(%)&h
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T*ableabGoveshowsthatwhenweassumedacross-sectionof8.46pbwemeasuredtheexactsamevqalue,535which,meansthatwehadtotakeintoaccountsignalcontaminationsof6.2%(14.40events)and3.4%(14.02536events)(fortaustypGes1and2and3respectively*.bThisrepresentsanincreaseinthenumbGerofsignalevents537ofˠ10.82%fortypGes1and2and42.33%fortypGe3.CByconsideringsucheventsaspartofthesignalt'#btsample538weUUmeasureforthecross-sections:539յ!Dz+jetsUUtypGes1and2crosssection:n+[ٲ(t7ferYɍtr)=8:83䍑0+1:1401:12 1(stat)䍑0+0:8900:94(syst;)80:30(lumiq)pb;I!Dz+jetsUUtypGe3crosssection:n+[ٲ(t7ferYɍtr)=6:06䍑0+2:7702:62 1(stat)䍑0+0:9400:99(syst;)80:30(lumiq)pb;kICombinedUUcrosssection:n+[ٲ(t7ferYɍtr)=8:46䍑0+1:0601:04 1(stat)䍑0+0:9200:88(syst;)80:30(lumiq)pb:ThecorrespGondentlikelihoGodsofthesemeasurementsareshowninFigures19,20and21.IFigures22,23540andUU24showzoGomedingraphsofthesamelikelihoGodUUfunctionsdescribGedabove.541
AllUUassoGciatedsystematicsconcerningthismeasurementcanbeseeninT*ableXXXVI.542& U2E38	%~FPSfile="plots2/type2_llhood.eps" llx=0 lly=0 urx=567 ury=381 rwi=2154 j
FIG.T19:pTheloglik9elihoAodTfunctionfortypAe1and2Schannel{ٍ~FPSfile="plots2/type3_llhood.eps" llx=0 lly=0 urx=567 ury=381 rwi=2154 vFIG.T20:pTheloglik9elihoAodTfunctionfortypAe3Schannel~HPSfile="plots2/type123_llhood.eps" llx=0 lly=0 urx=567 ury=381 rwi=2154 fFIG.T21:pTheloglik9elihoAodTfunctionforallthreetypAescombined'72E39S%~EPSfile="plots2/xsec12_pres.eps" llx=0 lly=0 urx=567 ury=381 rwi=2154 S!FIG.T22:pZoAominoftheloglik9elihoodfunctionfort9ype1and2Sc9hannel%~DPSfile="plots2/xsec3_pres.eps" llx=0 lly=0 urx=567 ury=381 rwi=2154 `FIG.T23:pZoAominoftheloglik9elihoodfunctionfort9ype3Sc9hannel8Ǎ~FPSfile="plots2/xsecall_pres.eps" llx=0 lly=0 urx=567 ury=381 rwi=2154 PFIG.T24:pZoAominoftheloglik9elihoodfunctionforallthreet9ypescom9bined(:!2E40j
Aftermeasuringthecombinedcrosssectionweobservedasignicanthigherstatisticaluncertaintyvqalueif543comparedtotheoneweexpGectedtoseebasedonthefactthatwehaveapproximately5timesmoredatathan544in3rp17,:9wherethesignalcontaminationwasnottakenintoaccount(seeAppGendixG).f{F*urtherinvestigation545showedAthatthecutNNelec>0.9appliedtotaustypGe2onlywasrespGonsibleforsuchdiscrepancy*.Below546weUUshowthesamemeasurementasdoneabGovebutnowwithnoNNeleccutapplied.547
T*ableUUbGelowsummarizesthenumbGerofeventsineachchannelafternalselection.548@]/T:ABLETXXXIV:Finaln9umbAerTofev9entsTinthet9woTanalysisc9hannels.K?:@>'ff]tYV^$St9ypAeTI,II
ESt9ypAeTI,II(tted)kSt9ypAeTIIIѼSt9ypAeTIII(tted)Ήff]tdatadZT583?459
􍍑ptSaHWt!Ƽ7+8jetsQ\85.46T0.58ؿ38.82T0.39O1tSaHWt!Ƽe8+jetsO]175.23T0.856.52T0.16MtSaHWt!Ƽ8+jetsT*[8.98T0.195.14T0.14StSaHWt!Ƽl4q+8lQ\12.62T0.104.18T0.06BtSaHWtlototalTMC%"282.27T1.0554.67T0.41tSaHWtlototalTtted#260.71T20.7435.73T15.28
WH+jetsQ\39.65T0.50ؿ11.26T0.25Z+jetsT*[4.56T0.102.38T0.11LQCD#278.04T20.74B409.62T15.28SignalTsignicance\710.80+1.67S/BTratio60.80+0.08Z(>
T*ableUUbGelowshowstheiterationproGcessinthiscaseandandthecrosssectionmeasurementfollows:549
ǟcffY&h
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ffff*Ǎ+T:ABLETXXXV:Cross-sectioniterationproAcess.+N9յ!Dz+jetsUUtypGes1and2crosssection:n+[ٲ(t7ferYɍtr)=7:03䍑0+0:5400:56 1(stat)䍑0+0:6500:61(syst;)80:30(lumiq)pb;I!Dz+jetsUUtypGe3crosssection:n+[ٲ(t7ferYɍtr)=4:36䍑0+2:6202:50 1(stat)䍑0+0:6200:61(syst;)80:30(lumiq)pb;kICombinedUUcrosssection:n+[ٲ(t7ferYɍtr)=6:92䍑0+0:5400:54 1(stat)䍑0+0:6200:60(syst;)80:30(lumiq)pb;
Aswecanseethestatisticaluncertaintydecreasesto0.54pbwhichisinagoGodagreementtowhatwe550would%gexpGectifcomparedto1.2pbmeasuredinp17.aAppendixGshowscrosssectionsmeasurementswhen551signalcontaminationisnottakenintoaccountforbGothNNelec>0.9andnoNNeleccutapplied.@Onceagain552weUUobservedadiscrepancywhenNNelecisappliedandtheexpGectedvqaluewhenNNelecisnotapplied.553)<2E41j6tXI.ߠSYSTEMATICUNCERTAINTIES554
Severalfactorscontributetosystematicuncertaintiesinthemeasurement.?HerewedescribGesuchuncer-555tainties.556!C%کA.
^JES557Thetjetenergyscale(JES)tzsystematicisdeterminedbyshitingthejetenergyscaleby1НinallMC558samples.559!C%!B.
^TES560TheWtauenergyscale(TES)Wsystematicisdeterminedbyshitingthetauenergyscalebyitsuncertaintyas561givenUUin[36
].562!C%,C.
^JetEnergyResolutionandJetID563The͓jetenergyresolution(JER)tsystematicisdeterminedbyshitingthejetenergyresolutionby1)lin564allUUMCsamples.565!C%D.
^Trigger566EachjneventwascorrectedbytheratiooftheactualandpredictedtriggerresultasafunctionofHTL,owhich567wasUUusedbasedonthefactthattheagreementvqariesasfunctionofit.568!C%hE.
^b-quarkfragmenCtation569Thisc'uncertaintyisestimatedusingthestandardproGceduredescribedin[17
]byreweightingt'#bteventsusing570dierentUUfragmentationfunctions.571!C%uF.
^b-tagging572b-tagginguncertaintyeectsaretakenintoaccountbyvqaryingthesystematicandstatisticalerrorsonthe573MCUUtaggingweights.574
TheseϹerrors(whicharecomputedusingstandardDbIDϚgrouptoGols)ariseformseveralindepGendent575sourcesUU[27
]:576B-jetUUtaggingparameterization.577C-jetUUtaggingparameterization.578LightUUjettaggingparameterization(negativetagrate).579Semi-leptonicUUb-taggingeciencyparameterizationinMCandindata(System8).580T*aggability.gThisiincludesthestatisticalerrorduetonitestatisticinthesamplesfromwhichithad581bGeenUUderivedandsystematic,re
ectingthe(neglected)taggabilitydepGendenceonthejetmultiplicity*.582*N2E42jEG.
^ĝIDsystematics583HereweincludesystematicsassoGciatedtotheNNrcut(NN>0.90fortaustypGes1and2andNN>0.95for584taustypGe3)appliedtoselecthadronictaus.EAsrecommendedbythe!Dz-IDѽgroupthesesystematicsare9.5%,5853.5%+and5.0%fortaustypGe1,١2and3respectively*.IHowever+inthisanalysiswechosetreattaustypGes1586andUU2together.qThisledustocombinetheiruncertaintiesinthefollowingway587sy[s12?=7q7feE2.ɍ:2l1S8f:2l1+:2l2f:2l2((9)\wheree1[and2aretheIDeecienciesfortaustypGes1and2respectivelyandf1[andf2arethefractions588ofUUtaustypGes1(0.16)and2(0.84)respectively*.589!C%H.
^QCDsystematics590
As7explainedinthesectionVIGIIA7weusethecontrol(b-veto)datasettovqalidateourmethoGdofmodeling591themultijetbackground.LThereforewehavetousethesamesampletoevqaluatetheassoGciateduncertainties.592Thed'wayitwasdoneisbyreweightingtopGologicaleventNNd#forQCDtemplate(\loGose-tight"!Dz),gsothatit593matchesUUtheonefor\tight"wdataexactly(electroweakbGeckgroundsweresubtracted).594!C%NI.
^WandZscalefactors595
W*eSapplyaascalefactorof1.47tobGothWS+bbandW+cceventsSwithanuncertaintySof15%.qCAtthe596sametimeascalesfactorsof1.52and1.67areappliedtoZ+bbandZ+ccevents,բbGothwithanuncertainty597ofUU20%.598!C%qJ.
^Templatestatistics599
When܄wepGerformedthetemplatettodata(SectionVIII)theQCDftemplatehadlimitedstatistics(1132600events)fortaustypGes1and2and4487eventsfortaustypGe3).BW*ehavetotakethestatisticaluncertainty601inthishistogramasoneofthecrosssectionsystematics.Itwascalculatedbyvqaryingthecontentofeach602bin\oftheQCD\templateNNdistributionwithinitsuncertainty\andobservinghowthecrosssectionresult603changed.604!C%~G0K.
^tVۍ %tconCtaminationintheloKose-tightsample605
WhenZmeasuringthecross-sectionwehadtotakeintoaccountthesignalcontaminationintheloGose-tight606sampleweusetomoGdelQCDɢinthehighNNregion.CBThesystematicuncertaintyinthiscaseiscalculatedby607vqaryingthenalassumedcrosssectionby1[ٲ,֔re-estimatingthesignalcontaminationandnallymeasuring608theUUupanddownvqaluesofthecrosssection.609!C%L.
^PDF610
SystematicsyonPartonDistributionF*unctions(PDF)yDareestimatedbyreweightingsignalt'#btMCyDfrom611CTEQ6L1ŗtoCTEQ6.1manditstwentyŗerrorPDF's.ThereweightingŗofthePDF'sisdonebyusing612FcafEff&fǫpdfreweight/packqagetoGolonPythiat'#btDMC.W*ethenassignedtherelativePDFuncertaintyobtained613withUUPythiaontheAlpgent'#btDzMC.614+X2E43jM.
^LuminositCy615
HereUUwetaketheDstandardmeasureduncertaintyonluminosityof6.1%.616
T*ables6XXXVIandXXXVIGIsummarizealloftheseuncertainty6sourcesandshowshowtheresultingcross617sectionUUshifts.618OT:ABLETXXXVI:Systematicuncertain9tiesonR(tVۍ %tW)(inpb)forNNelec>0.9.Vs,ak-3:ffYhChannelX*2cmmi8r+jetsXtÎyp<res1and2P<r+jetsXtÎyp<re3~ComÎbined

uTJauXEnergyScalegvq+0:068;0:102q+0:340;0:306ݟq+0:136;0:136;JetXEnergyScalegvq+0:051;0:034q+0:051;0:085ݟq+0:051;0:000JetXEnergyResolutiongvq+0:102;0:051q+0:204;0:034ݟq+0:119;0:052|JetXIDgvq+0:204;0:204q+0:153;0:153ݟq+0:204;0:204!b-taggvq+0:562;0:493q+0:493;0:426ݟq+0:544;0:477
ab-fragmenÎtationgvq+0:102;0:102q+0:068;0:068ݟq+0:085;0:085!QCDXMo<rdelinggvq+0:340;0:340q+0:221;0:221ݟq+0:324;0:305"6IDgvq+0:272;0:272q+0:306;0:306ݟq+0:290;0:290
pTJriggergvq+0:256;0:256q+0:238;0:238ݟq+0:256;0:256QWXScaleFJactorgvq+0:034;0:034q+0:034;0:034ݟq+0:034;0:034ZXScaleFJactorgvq+0:072;0:072q+0:072;0:072ݟq+0:048;0:048DTJemplateXstatisticsgvq+0:156;0:156q+0:204;0:204ݟq+0:168;0:168;SignalXconÎtaminationgvq+0:153;0:153q+0:255;0:272ݟq+0:188;0:170"~*PDFgvq+0:097;0:084q+0:188;0:198ݟq+0:092;0:081u&2 ùT:ABLETXXXVIAI:Systematicuncertain9tiesonR(tVۍ %tW)(inpb)whennoNNeleccutisapplied.ak-3:ffYhChannelXr+jetsXtÎyp<res1and2P<r+jetsXtÎyp<re3~ComÎbined

uTJauXEnergyScalegvq+0:101;0:002q+0:238;0:255ݟq+0:102;0:017;JetXEnergyScalegvq+0:016;0:001q+0:017;0:000ݟq+0:016;0:000JetXEnergyResolutiongvq+0:084;0:086q+0:017;0:034ݟq+0:068;0:085|JetXIDgvq+0:169;0:169q+0:017;0:017ݟq+0:153;0:153!b-taggvq+0:424;0:375q+0:358;0:306ݟq+0:425;0:375
ab-fragmenÎtationgvq+0:069;0:069q+0:102;0:102ݟq+0:068;0:068!QCDXMo<rdelinggvq+0:271;0:273q+0:153;0:136ݟq+0:225;0:256"6IDgvq+0:220;0:220q+0:204;0:204ݟq+0:221;0:221
pTJriggergvq+0:204;0:204q+0:170;0:170ݟq+0:204;0:204QWXScaleFJactorgvq+0:034;0:034q+0:034;0:034ݟq+0:034;0:034ZXScaleFJactorgvq+0:072;0:072q+0:072;0:072ݟq+0:048;0:048DTJemplateXstatisticsgvq+0:118;0:118q+0:170;0:170ݟq+0:102;0:102;SignalXconÎtaminationgvq+0:050;0:052q+0:136;0:187ݟq+0:051;0:051"~*PDFgvq+0:097;0:084q+0:188;0:198ݟq+0:092;0:081,h42E44jp @)0  fz@=`[1]cJ.TA.Coarasa,J.Guasc9h,andJ.Sola,RepAortNo.UAB-FT-451,1999,hep-ph/9903212619
[2]c9j		cmti9MeasurementN<oftoppairproductioncrosssectionfromthetau+jetschannel,TDNote5158.620[3]cMeasurementN<ofR(pDZp6{!ƼtVۍ %tWX[)in7+8jetschannelusing1fb-=1
?ofdata,TDNote5765.621[4]cCommomTSampleGroup,JߤN		cmtt9Jhttp://www-d0.fnal.gov/Run2Physics/cs/index.html622[5]cSearchN<forneutralHiggsbosonsinbƾ!ba`bbN<usingRÎunIIbdata,TDNote5709623[6]cCommomTSampleGroup,Jhttp://www-d0.fnal.gov/Run2Physics/cs/MC/MC.html624[7]cM.L.`Manganoet/al.,\ALPGEN:ageneratorforhardm9ultipartonproAcessinhadroniccollisions",JHEPX0307,625c001T(2003);626[8]cT.`Sjostrand,rP:.Eden,C.F:ribAerg,L.Lonn9blad,G.Miu,S.MrennaandE.norbin,ComputerPh9ys.Commun.627c135,T238(2001).628[9]cJhttp://c9harm.physics.ucsb.edu/pAeople/lange/EvtGen/629[10]cS.TJadac9h,Z.W:as,R.Decker,J.H.Kuehn,Comp.Phys.Commun.,361(1993)(CERNTH-6793preprint).630[11]cJhttp://www-d0.hef.ru.nl//askArchive.php?base=agenda&categ=a081895&id=a081895s0t3/transparencies.631[12]cS.TMuanza,AN<compilationofMCFMv5.1CrossSections.TDNote5300.632[13]cSystematicsN<UncertaintiesinTJopQuarkMeasurements,TDNote6024.633[14]cJhttps://plone4.fnal.gov/P1/D0Wiki/comp/caf/MCreweighting/lumiprofile-reweighting.634[15]cH.TSc9hellman,TheN<longitudinalshapeoftheluminousregionsatDcDTNote5885.635[16]cD.TPrice,W.Fisher,andJ.Haley:,StudiesN<ofAÎlpgenparameterscorrectionsanduncertainties,TDNote5966.636[17]cY.P9eters,M.Begel,K.Hamac9her,andD.Wic9ke,ReweightingNofthefragmentationfunctionfortheDMonte637cCarlo,TDNote5325.638[18]cN.TMak9ovecandJ.F.Griv|raz,Shiting,N<smearing,andremovingsimulatedjets,TDNote4914.639[19]cSearch$FJorMSSMHiggsBosonProduction$intheDecay$hƾ!hadDwiththeDDetectoratatqp
vqaHqr1:96+ZTJeV,…D640cNoteT5708.641[20]cDN<V;IDcertication,TDNote4773.642[21]cS.EldelmanTetN<al.(P9articleDataGroup),Phys.Lett.B592,1(2004)and2005643[22]cG.C.TBlazeyetal.,arXiv.hep-ex/0005012(2000).644[23]cG.Bernardi, E.y+BusatoandJ.R.Vliman9t,ImprovementsfromtheT42AÎlgorithmoncalorimeterobjectsrecon-645cstruction,TDNote4335.646[24]cA.THarel,JetN<IDOptimization,TDnote4919.647[25]cJetN<EnergyScaleDeterminationatDRÎunII,TDNote5382.648[26]cA.THarel,CappingN<theJESmuoncorrections,TDNote5563.649[27]cT.Gadfort,A.Haas,D.Johnston,D.Lincoln,T.ScalonandS.Sc9hlobAohmPerformanceoftheDNNҲb-tagging650cTJoolN<onp20Data,TDNote5554651[28]cM.TAnastasoaie,S.Robinson,T.Scalon,PerformanceN<oftheNNb-taggingTJoolonp17Data,TDNote5213652[29]cT.TScalonandS.Greder,MeasurementN<ofthep20FJakeRateusingBinnedFitsdoData,TDNote6046653[30]cSearchN<forSingleTJopQuarkProductionN<with1.0fb-=1	,TDNote5285654[31]cMeasurementN<ofthettbarcrosssectioninthelepton+jetschannelwith5.3fb-=1
,TDNote6028.655[32]cDTNote5350andDNote5360656[33]cMeasurementN<ofthetVۍ %t!Ƽal&9l4q8jetsproductionN<crosssectionusingSecondaryVJertexTagging,TDNote4830657[34]c6|rET	*"signicanceN<AÎlgorithminRunIIData,TDNote4254658[35]cMeasurement|ofthetop-antitopquarkpairproductioncrosssectioninproton-antiprotoncolxlisionsatqp
ΟqaHqr1:96.
TJeV659cinN<thelepton+jetsnalstate,TDNote5262660[36]cJhttp://www-d0.hef.kun.nl//fullAgenda.php?ida=a092001&fid=57.661[37]cD SearchforNeutralHiggsBosonsathightan:inthenalstatehڪbwith4.3fb-=1
`ofRÎun2bData,D662cNoteT6077.663[38]cJhttp://sc9hwind.home.cern.ch/schwind/MLPt.html664-y2E45jpAPPENDIXA:TRIGGEREFFICIENCIES665InthisappGendixwepresentthetriggerweightdistributionsofallMCsamplesfordierentnumbGersof666b-taggedUUjets.qThesearetheweightUUdistributionswereferredtoinSectionsIGIAandIII.667!C%y1.
^TriggerEcienciesfor7+8jets668RI0JPSfile="trigger_eff/taujets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/taujets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0JPSfile="trigger_eff/taujets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/taujets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 DEFIG.T25:pT:riggerEcienciesfor7+8jets./C%4:2.
^TriggerEcienciesfore8+jets669I0HPSfile="trigger_eff/ejets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/ejets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0HPSfile="trigger_eff/ejets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/ejets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 FIG.T26:pT:riggerEcienciesfore8+jets..Ӡ2E46jV3.
^TriggerEcienciesfor8+jets670RI0IPSfile="trigger_eff/mujets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNIPSfile="trigger_eff/mujets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0IPSfile="trigger_eff/mujets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNIPSfile="trigger_eff/mujets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 "FIG.T27:pT:riggerEcienciesfor8+jets./C%4.
^TriggerEcienciesfordil&9epton671I0HPSfile="trigger_eff/dilep0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/dilep1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0HPSfile="trigger_eff/dilep2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/dilep3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 _FIG.T28:pT:riggerEcienciesfordil&9epton./T2E47j5.
^TriggerEcienciesforal&9ljets672RI0JPSfile="trigger_eff/alljets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/alljets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0JPSfile="trigger_eff/alljets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/alljets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 pFIG.T29:pT:riggerEcienciesforal&9ljets./C%6.
^TriggerEcienciesforWHjjI+8jets673I0JPSfile="trigger_eff/Wjjjets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Wjjjets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0JPSfile="trigger_eff/Wjjjets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Wjjjets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 FIG.T30:pT:riggerEcienciesforWHjjI+8jets.0q2E48jao7.
^TriggerEcienciesforWHbb8+jets674RI0JPSfile="trigger_eff/Wbbjets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Wbbjets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0JPSfile="trigger_eff/Wbbjets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Wbbjets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 ;FIG.T31:pT:riggerEcienciesforWHbb8+jets./C%W
8.
^TriggerEcienciesforWHcc8+jets675I0JPSfile="trigger_eff/Wccjets0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Wccjets1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0JPSfile="trigger_eff/Wccjets2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Wccjets3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 ֹFIG.T32:pT:riggerEcienciesforWHcc8+jets.12E49jr^9.
^TriggerEcienciesforZjjI+8jetsƾ!ee+jjI+jets676RI0HPSfile="trigger_eff/Zlpee0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/Zlpee1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0HPSfile="trigger_eff/Zlpee2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/Zlpee3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 nsFIG.T33:pT:riggerEcienciesforZjjI+8jetsƾ!ee+jjI+jets./C%p_10.
^TriggerEcienciesforZbb8+jetsƾ!ee8+bb+jets677I0HPSfile="trigger_eff/Zbbee0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/Zbbee1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0HPSfile="trigger_eff/Zbbee2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/Zbbee3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 oFIG.T34:pT:riggerEcienciesforZbb8+jetsƾ!ee8+bb+jets.22E50jpJ11.
^TriggerEcienciesforZcc8+jetsƾ!ee8+cc+jets678RI0HPSfile="trigger_eff/Zccee0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/Zccee1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0HPSfile="trigger_eff/Zccee2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNHPSfile="trigger_eff/Zccee3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 okIFIG.T35:pT:riggerEcienciesforZcc8+jetsƾ!ee8+cc+jets./C%noI12.
^TriggerEcienciesforZjjI+8jetsƾ!+jjI+jets679I0JPSfile="trigger_eff/Zlpmumu0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zlpmumu1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0JPSfile="trigger_eff/Zlpmumu2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zlpmumu3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 mFIG.T36:pT:riggerEcienciesforZjjI+8jetsƾ!+jjI+jets.3Š2E51jo13.
^TriggerEcienciesforZbb8+jetsƾ!8+bb+jets680RI0JPSfile="trigger_eff/Zbbmumu0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zbbmumu1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0JPSfile="trigger_eff/Zbbmumu2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zbbmumu3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 n:LFIG.T37:pT:riggerEcienciesforZbb8+jetsƾ!8+bb+jets./C%o14.
^TriggerEcienciesforZcc8+jetsƾ!8+cc+jets681I0JPSfile="trigger_eff/Zccmumu0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zccmumu1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0JPSfile="trigger_eff/Zccmumu2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zccmumu3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 n%FIG.T38:pT:riggerEcienciesforZcc8+jetsƾ!8+cc+jets.42E52jn珺15.
^TriggerEcienciesforZjjI+8jetsƾ!7+jjI+jets682RI0LPSfile="trigger_eff/Zlptautau0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNLPSfile="trigger_eff/Zlptautau1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0LPSfile="trigger_eff/Zlptautau2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNLPSfile="trigger_eff/Zlptautau3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 nFIG.T39:pT:riggerEcienciesforZjjI+8jetsƾ!7+jjI+jets./C%o/16.
^TriggerEcienciesforZbb8+jetsƾ!7+8bb+jets683I0LPSfile="trigger_eff/Zbbtautau0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNLPSfile="trigger_eff/Zbbtautau1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0LPSfile="trigger_eff/Zbbtautau2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNLPSfile="trigger_eff/Zbbtautau3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 nFIG.T40:pT:riggerEcienciesforZbb8+jetsƾ!7+8bb+jets.5S2E53jo}e17.
^TriggerEcienciesforZcc8+jetsƾ!7+8cc+jets684RI0LPSfile="trigger_eff/Zcctautau0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNLPSfile="trigger_eff/Zcctautau1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0LPSfile="trigger_eff/Zcctautau2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNLPSfile="trigger_eff/Zcctautau3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 nȹFIG.T41:pT:riggerEcienciesforZcc8+jetsƾ!7+8cc+jets./C%n݄18.
^TriggerEcienciesforZjjI+8jetsƾ!q+jjI+jets685I0JPSfile="trigger_eff/Zlpnunu0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zlpnunu1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0JPSfile="trigger_eff/Zlpnunu2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zlpnunu3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 mFIG.T42:pT:riggerEcienciesforZjjI+8jetsƾ!q+jjI+jets.6R2E54jo$19.
^TriggerEcienciesforZbb8+jetsƾ!q+8bb+jets686RI0JPSfile="trigger_eff/Zbbnunu0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zbbnunu1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 l_I0JPSfile="trigger_eff/Zbbnunu2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zbbnunu3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 nFIG.T43:pT:riggerEcienciesforZbb8+jetsƾ!q+8bb+jets./C%osZ20.
^TriggerEcienciesforZcc8+jetsƾ!q+8cc+jets687I0JPSfile="trigger_eff/Zccnunu0eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zccnunu1eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 I0JPSfile="trigger_eff/Zccnunu2eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 kNJPSfile="trigger_eff/Zccnunu3eff.eps" llx=0 lly=0 urx=567 ury=381 rwi=1587 nFIG.T44:pT:riggerEcienciesforZcc8+jetsƾ!q+8cc+jets./C%9APPENDIXB:TURNONCURVESFCORTRIGGERJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX688HereYitisshownallturn-oncurvesforallthreelevelsofthetriggerJT2ff3JT15LffIPffVXYkasYdescribGedin689SectionUUIGII.6907I2E55j[D1.
^LevCel1jetturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX6913CPSfile="lowLum/l1jetspt8.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 DL(a)XpX.T8Z>8GeVyDPSfile="lowLum/l1jetspt15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 ʿ(b)XpX.T8Z>15GeV0"DPSfile="lowLum/l1jetspt30.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 TY(c)XpX.T8Z>30GeV1rFIG.T45:pLev9el1jetturn-oncurves,lowluminosity:.82E56đ3CPSfile="medLum/l1jetspt8.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 DL(a)XpX.T8Z>8GeVyDPSfile="medLum/l1jetspt15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 ʿ(b)XpX.T8Z>15GeV0"DPSfile="medLum/l1jetspt30.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 TY(c)XpX.T8Z>30GeV1yFIG.T46:pLev9el1jetturn-oncurves,mediumluminosity:.Q3DPSfile="highLum/l1jetspt8.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 DL(a)XpX.T8Z>8GeVyEPSfile="highLum/l1jetspt15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 ʿ(b)XpX.T8Z>15GeV0"EPSfile="highLum/l1jetspt30.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 TY(c)XpX.T8Z>30GeVFIG.T47:pLev9el1jetturn-oncurves,highluminosity:.9c2E57j[D2.
^LevCel2jetturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX6923CPSfile="lowLum/l2jetspt8.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 3(a)XLoÎwluminositypX.T8Z>	VE8XGeVyCPSfile="medLum/l2jetspt8.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 ˡ(b)XMediumluminositÎypX.T8Z>	8XGeV0"DPSfile="highLum/l2jetspt8.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 EF(c)XhighluminositÎypX.T8Z>	g8XGeV9@IPFIG.T48:pLev9el2pTm>8GeVjetsturn-oncurves./C%Zֺ3.
^LevCel2HT	hturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX693c@PSfile="lowLum/l2ht75.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 :O(a)XHX.T8Z>75GeVkNAPSfile="lowLum/l2ht100.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 (b)XHX.T8Z>100GeV17dFIG.T49:pL2HT:turn-oncurv9es,lowluminosity:.Qc@PSfile="medLum/l2ht75.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 :O(a)XHX.T8Z>75GeVkNAPSfile="medLum/l2ht100.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 (b)XHX.T8Z>100GeVFIG.T50:pL2HT:turn-oncurv9es,mediumluminosity:.:S2E58ʀcAPSfile="highLum/l2ht75.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 :O(a)XHX.T8Z>75GeVkNBPSfile="highLum/l2ht100.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 (b)XHX.T8Z>100GeV1JFIG.T51:pL2HT:turn-oncurv9es,highluminosity:.[T4.
^LevCel26|rET	hturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX694cBPSfile="lowLum/l2mhtv15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 (a)X6EX.T>>10GeVkNBPSfile="lowLum/l2mhtv16.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 -(b)X6EX.T>>20GeV1AFIG.T52:pL26|rET:turn-oncurv9es,lowluminosity:.QcBPSfile="medLum/l2mhtv15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 (a)X6EX.T>>10GeVkNBPSfile="medLum/l2mhtv16.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 -(b)X6EX.T>>20GeVFIG.T53:pL26|rET:turn-oncurv9es,mediumluminosity:.;͵2E59ʀcCPSfile="highLum/l2mhtv15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 (a)X6EX.T>>10GeVkNCPSfile="highLum/l2mhtv16.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 -(b)X6EX.T>>20GeV1FIG.T54:pL26|rET:turn-oncurv9es,highluminosity:.I{5.
^LevCel2SphericityturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX6953APSfile="lowLum/l2spher.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 -X(a)XSphericitÎy>0.1turn-on	:}ucurvÎe,XlowluminosityyAPSfile="lowLum/l2spher.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 7(b)XSphericitÎy>0.1turn-on	curvÎe,Xmediumluminosity0"APSfile="medLum/l2spher.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 ?(c)XSphericitÎy>0.1turn-on	JWpcurvÎe,Xhighluminosity:9)FIG.T55:pL2Sphericit9yturn-oncurves./C%Qe]6.
^LevCel2STTIPturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX696cGPSfile="lowLum/l2stt01taglol.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 sz(a)XL2STTIPJ,0and1tighÎt	NNXtagskNGPSfile="lowLum/l2stt23taglol.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 
(b)XL2STTIPJ,2and3tighÎt	NNXtags;N9FIG.W56:L2STTIPWeciencyinthelo9wluminosityrange.-Left:eventswith0(red)and1(black)tightNNWb-tags.
Righ9t:peventsTwith2(red)and3(blac9k)tightNNb-tags.<Ѡ2E60WǍcDPSfile="medLum/l2stt01tag.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 sz(a)XL2STTIPJ,0and1tighÎt	NNXtagskNDPSfile="medLum/l2stt23tag.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 
(b)XL2STTIPJ,2and3tighÎt	NNXtags;N9FIG.57:*L2STTIP|eciencyinthemediumluminosit9yrange.Left:ev9entswith0(red)and1(blac9k)tightNN
b-tags.pRigh9t:eventsTwith2(red)and3(black)tightNNb-tags.WǍcHPSfile="highLum/l2stt01taghil.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 sz(a)XL2STTIPJ,0and1tighÎt	NNXtagskNHPSfile="highLum/l2stt23taghil.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 
(b)XL2STTIPJ,2and3tighÎt	NNXtags;N9FIG.,58:K L2STTIP,eciencyinthehighluminosit9yrange.bxLeft:ev9ents,with0(red)and1(blac9k)tightNN,b-tags.
Righ9t:peventsTwith2(red)and3(blac9k)tightNNb-tags.[D7.
^LevCel3jetturnoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX697cDPSfile="lowLum/l3jetspt15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 j(a)XpX.T8Z>15GeVkNDPSfile="lowLum/l3jetspt25.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 '(b)XpX.T8Z>25GeV1չFIG.T59:pL3jetturn-oncurv9es,lowluminosity:.=$2E61đcDPSfile="medLum/l3jetspt15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 j(a)XpX.T8Z>15GeVkNDPSfile="medLum/l3jetspt25.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 '(b)XpX.T8Z>25GeV1RFIG.T60:pL3jetturn-oncurv9es,mediumluminosity:.QcEPSfile="highLum/l3jetspt15.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 j(a)XpX.T8Z>15GeVkNEPSfile="highLum/l3jetspt25.eps" llx=0 lly=0 urx=567 ury=384 rwi=1332 '(b)XpX.T8Z>25GeVƀFIG.T61:pL3jetturn-oncurv9es,highluminosity:./C%aO8.
^LevCel3b-tagoncurvesfortriggerJT2ff1뎎~3JT15Lff1뎎IPff1뎎VX698s
*w[HPSfile="lowLum/l3btag01taglol.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 =(a)X0and1b-tags.kNHPSfile="lowLum/l3btag23taglol.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 0(b)X2and3b-tags.2@FIG.62:*(a)EciencyoftheL3b-tag(Lev9el3Eventb-tag<0.4)forthelowluminosityrangeintriggerlistv15.BThe
selected <ev9entspassedtherestofthetriggerandoineeventselectionandhadzero(red)orone(black)oineNN(TIGHT)Tb-tags.p(b)Sameforev9entsTwith2(red)and3(blac9k)oineNN(TIGHT)b-tags.>ठ2E627w[EPSfile="medLum/l3btag01tag.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 =(a)X0and1b-tags.kNDPSfile="medLum/l3btag2tag.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 0(b)X2and3b-tags.2@FIG.63:(a)EciencyoftheL3b-tag(Lev9el3Eventb-tag<0.4)forthemediumluminosityrangeintriggerlistv15.
Theselectedev9entspassedtherestofthetriggerandoineev9entselectionandhadzero(red)orone(blac9k)oineNNT(TIGHT)b-tags.p(b)Sameforev9entsTwith2(red)and3(blac9k)oineNN(TIGHT)b-tags.sS7w[IPSfile="highLum/l3btag01taghil.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 =(a)X0and1b-tags.kNIPSfile="highLum/l3btag23taghil.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 0(b)X2and3b-tags.FIG.e64:(a)EciencyoftheL3b-tag(Lev9el3Eventb-tag<0.4)forthehighluminosityrangeintriggerlistv15.Theselected <ev9entspassedtherestofthetriggerandoineeventselectionandhadzero(red)orone(black)oineNN(TIGHT)Tb-tags.p(b)Sameforev9entsTwith2(red)and3(blac9k)oineNN(TIGHT)b-tags.YwTPSfile="lowLum/l3btag01tagv16lol.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 rhi=1133 >O(a)X0and1b-tags.kNSPSfile="lowLum/l3btag2tagv16lol.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 rhi=1133 (b)X2and3b-tags.FIG.65:*(a)EciencyoftheL3b-tag(Lev9el3Eventb-tag<0.4)forthelowluminosityrangeintriggerlistv16.BTheselected <ev9entspassedtherestofthetriggerandoineeventselectionandhadzero(red)orone(black)oineNN(TIGHT)Tb-tags.p(b)Sameforev9entsTwith2(red)and3(blac9k)oineNN(TIGHT)b-tags.?梠2E63'OYwQPSfile="medLum/l3btag01tagv16.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 rhi=1133 >O(a)X0and1b-tags.kNPPSfile="medLum/l3btag2tagv16.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 rhi=1133 (b)X2and3b-tags.2@FIG.66:(a)EciencyoftheL3b-tag(Lev9el3Eventb-tag<0.4)forthemediumluminosityrangeintriggerlistv16.
Theselectedev9entspassedtherestofthetriggerandoineev9entselectionandhadzero(red)orone(blac9k)oineNNT(TIGHT)b-tags.p(b)Sameforev9entsTwith2(red)and3(blac9k)oineNN(TIGHT)b-tags.9FwUPSfile="highLum/l3btag01tagv16hil.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 rhi=1133 >O(a)X0and1b-tags.kNTPSfile="highLum/l3btag2tagv16hil.eps" llx=0 lly=0 urx=567 ury=384 rwi=1133 rhi=1133 (b)X2and3b-tags.2@FIG.e67:(a)EciencyoftheL3b-tag(Lev9el3Eventb-tag<0.4)forthehighluminosityrangeintriggerlistv16.The
selected <ev9entspassedtherestofthetriggerandoineeventselectionandhadzero(red)orone(black)oineNN(TIGHT)Tb-tags.p(b)Sameforev9entsTwith2(red)and3(blac9k)oineNN(TIGHT)b-tags.@z2E64jzKAPPENDIXC:DISCRIMINANTVARIABLES699ThisappGendixshowsnormalizedplotsofsignalandbackgroundsamplesforalldiscriminantvqariablestested700forUUthisanalysis.701>CPSfile="plots/metl_allEW.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 kNFPSfile="variables/aplan_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 sӍ>EPSfile="variables/cent_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 kNFPSfile="variables/sqrts_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 >FPSfile="variables/spher_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 kNCPSfile="variables/ht_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 >IPSfile="variables/topmassl_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 kNMPSfile="variables/costhetastar_all.eps" llx=0 lly=0 urx=567 ury=381 rwi=1701 @FIG.T68:pDiscriminan9tv|rariables.A2E65jAPPENDIXD:SETOPTIMIZATION702InthisappGendixitisshownplotsofthegureofmerit(Equation6)usedtoperformtheNNvqariablesset703optimizationUUasdescribGedinSectionVIIIC.704B2E660e؍K`FPSfile="SetOpt/ensemble1-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble12-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensemble13-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 iK`GPSfile="SetOpt/ensemble14-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble15-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HFPSfile="SetOpt/ensemble3-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`FPSfile="SetOpt/ensemble4-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TFPSfile="SetOpt/ensemble5-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HFPSfile="SetOpt/ensemble7-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`FPSfile="SetOpt/ensemble9-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble10-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HHPSfile="SetOpt/ensemble12A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`HPSfile="SetOpt/ensemble13A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 THPSfile="SetOpt/ensemble14A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HHPSfile="SetOpt/ensemble15A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`HPSfile="SetOpt/ensemble16A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 THPSfile="SetOpt/ensemble17A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HHPSfile="SetOpt/ensemble18A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 >FIG.T69:pSetsofNNinputsv|rariableswith6ET:signicance>4.0forsetoptimization.C{2E67jlAPPENDIXE:SETOPTIMIZATIONCONTINUED705InthisappGendixitisshownplotsofthegureofmerit(Equation6)usedtoperformtheNNvqariablesset706optimizationUUasdescribGedinSectionVIIIC.707pđCwK`HPSfile="SetOpt/ensemble19A-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble20-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensemble21-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 iK`GPSfile="SetOpt/ensemble22-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble23-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensemble24-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`GPSfile="SetOpt/ensemble25-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble26-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensemble27-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`GPSfile="SetOpt/ensemble28-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensemble29-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensemble30-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 K`GPSfile="SetOpt/ensemble31-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensembleMS-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensemble33-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 >FIG.T70:pSetsofNNinputsv|rariableswith6ET:signicance>4.0forsetoptimization.D 2E68jjAPPENDIXF:6|rET	hSIGNIFICANCEOPTIMIZATION708K`GPSfile="SetOpt/ensembleMS-30.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 TGPSfile="SetOpt/ensembleMS-35.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 :HGPSfile="SetOpt/ensembleMS-40.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 iOZGPSfile="SetOpt/ensembleMS-45.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 kNFPSfile="SetOpt/ensembleMS50.eps" llx=0 lly=0 urx=567 ury=384 rwi=1530 /9FIG.T71:pV:ariationof6|rET:signicancecutforSetXXXIAI=metl,HT,topmassl,aplan,sqrts.E2E69jAPPENDIXG:CRCOSSSECTIONMEASUREMENTSWHENSIGNALCONTAMINATIONIS709
IGNORED710InthisappGendixitisshownplotsofthegureofmerit(Equation6)usedtoperformtheNNvqariablesset711optimizationUUasdescribGedinSectionVIIIC.712!C%a1.
^ResultsforSet=metl,HT,topmassl,aplan,sqrts,metl>4.0,lumi=4951.86/pb,VCCjetsand713׺NNelecʼ>0.9714
T*ableUUbGelowsummarizesthenumbGerofeventsineachchannelafternalselection.715@YT:ABLETXXXVIAII:Finaln9umbAerofeventsinthetwoanalysischannels.K?=#?>'ffXevYT%St9ypAeTI,IIjGSt9ypAeTI,II(tted)˰St9ypAeTIII
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􍍑ptSaHWt!Ƽ7+8jetsO]72.04T0.5338.82T0.39O1tSaHWt!Ƽe8+jetsO]38.35T0.36o6.52T0.16MtSaHWt!Ƽ8+jetsQ\4.81T0.14o5.14T0.14StSaHWt!Ƽl4q+8lQ\6.02T0.07o4.20T0.06BtSaHWtlototalTMC$121.22T0.43B54.68T0.20tSaHWtlototalTtted5%133.04T17.0933.12T15.04
WH+jetsO]17.82T0.3311.26T0.23Z+jetsQ\2.78T0.14o2.39T0.12LQCD5%232.35T17.09412.22T15.04SignalTsignicance86.77&y1.54S/BTratio80.52&y0.08Z(>
Without^takingintoaccountthesignalcontaminationtheresultis(onlystatisticaluncertaintiesareshown)716յ!Dz+jetsUUtypGes1and2crosssection:[ٲ(t7ferYɍtr)=8:05䍑0+1:0401:02 1(stat)80:30(lumiq)pb;I!Dz+jetsUUtypGe3crosssection:[ٲ(t7ferYɍtr)=4:24䍑0+1:9401:80 1(stat)80:30(lumiq)pb;kICombinedUUcrosssection:[ٲ(t7ferYɍtr)=7:26䍑0+0:9200:92 1(stat)80:30(lumiq)pb;F	Ơ2E70ja2.
^ResultsforSet=metl,HT,topmassl,aplan,sqrts,metl>4.0,lumi=4951.86/pb,VCCjetsand717
BYnoNNeleccut718
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