Annotation of ttbar/p20_taujets_note/Dataset.tex, revision 1.1
1.1 ! uid12904 1: %\newpage
! 2:
! 3: \section{Dataset \label{sec:dataset}}
! 4:
! 5: \subsection{\label{sub:datasample}\boldmath Data Sample}
! 6:
! 7: \noindent For this analysis the framework used was vjets\_cafe v04-00-08 (Release p21.18.00)
! 8: and the data set consisted of 3JET skim produced by the commom samples group
! 9: \cite{3jet_data} and recorded between August 2002 and May 2010 (runs 151817 - 258547).
! 10:
! 11:
! 12: \begin{itemize}
! 13: \item CSG$\_$CAF$\_3$JET$\_$PASS2$\_$p21.10.00
! 14: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.10.00$\_$p20.12.00
! 15: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.10.00$\_$p20.12.01
! 16: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.10.00$\_$p20.12.02
! 17: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.10.00$\_$p20.12.04
! 18: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.12.00$\_$p20.12.05$\_$allfix
! 19: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.10.00$\_$p20.16.07$\_$fix
! 20: \item CSG$\_$CAF$\_3$JET$\_$PASS4$\_$p21.12.00$\_$p20.16.07$\_$summer2010
! 21: \end{itemize}
! 22:
! 23:
! 24:
! 25: In this analysis we chose the three jets trigger JT2\_3JT15L\_IP\_VX.
! 26:
! 27:
! 28: This particular trigger was chosen based on our needs of looking for events with multiple jets and
! 29: the fact that it represents a gain of 20\% efficiency on signal selection if compared to previous p17 analysis.
! 30: Since the efficiencies for such trigger are not currently part of caf\_trigger package,
! 31: in this analysis we benefit from the trigger modelling provided by the $hbb$ group \cite{bIDH_note}
! 32: for the $\phi b \rightarrow b\bar{b}b$ analysis. Trigger weight distributions for all
! 33: MC samples used in the analysis as a function of the number of b-tagged jets are found in
! 34: %Appendix \ref{app:trig_eff} and summarized in Table \ref{trig_weight}:
! 35: Appendix \ref{app:trig_eff} and Table II summarizes their mean values:
! 36:
! 37:
! 38:
! 39: \begin{table}[h]
! 40: \begin{center}
! 41: \begin{tabular}{|c|r|r|r|r|} \hline
! 42: Process & 0 tags & 1 tag & 2 tags & 3 or more tags \\ \hline
! 43:
! 44: \hline
! 45:
! 46:
! 47: $t\overline{t}\rightarrow\tau+jets$ &\multicolumn{1}{c|}{0.7923} &\multicolumn{1}{c|}{0.8620} &\multicolumn{1}{c|}{0.8953} &\multicolumn{1}{c|}{0.9039} \\
! 48:
! 49: $t\overline{t}\rightarrow e+jets$ &\multicolumn{1}{c|}{0.7902} &\multicolumn{1}{c|}{0.8599} &\multicolumn{1}{c|}{0.8933}&\multicolumn{1}{c|}{0.9020} \\
! 50:
! 51: $t\overline{t}\rightarrow\mu+jets$ &\multicolumn{1}{c|}{0.7942} &\multicolumn{1}{c|}{0.8639} &\multicolumn{1}{c|}{0.8973}&\multicolumn{1}{c|}{0.9058} \\
! 52:
! 53: $t\overline{t}\rightarrow l+l$ &\multicolumn{1}{c|}{0.7274} &\multicolumn{1}{c|}{0.7915} &\multicolumn{1}{c|}{0.8223} &\multicolumn{1}{c|}{0.8302} \\
! 54:
! 55: $Wjj+jets\rightarrow$ $l\nu+jj+jets$ &\multicolumn{1}{c|}{0.5821} &\multicolumn{1}{c|}{0.6337} &\multicolumn{1}{c|}{0.6586}&\multicolumn{1}{c|}{0.6652} \\
! 56:
! 57: $Wbb+jets\rightarrow$ $l\nu+bb+jets$ &\multicolumn{1}{c|}{0.5948} &\multicolumn{1}{c|}{0.6475}&\multicolumn{1}{c|}{0.6729}&\multicolumn{1}{c|}{0.6796} \\
! 58:
! 59: $Wcc+jets\rightarrow$ $l\nu+cc+jets$ &\multicolumn{1}{c|}{0.5912} &\multicolumn{1}{c|}{0.6435}&\multicolumn{1}{c|}{0.6687}&\multicolumn{1}{c|}{0.6754} \\
! 60:
! 61: $Zjj+jets\rightarrow$ $ee+jj+jets$ &\multicolumn{1}{c|}{0.6769} &\multicolumn{1}{c|}{0.7363}&\multicolumn{1}{c|}{0.7646}&\multicolumn{1}{c|}{0.7719} \\
! 62:
! 63: $Zbb+jets\rightarrow$ $ee+bb+jets$ &\multicolumn{1}{c|}{0.4331} &\multicolumn{1}{c|}{0.4712}&\multicolumn{1}{c|}{0.4895}&\multicolumn{1}{c|}{0.4943} \\
! 64:
! 65: $Zcc+jets\rightarrow$ $ee+cc+jets$ &\multicolumn{1}{c|}{0.6167} &\multicolumn{1}{c|}{0.6746}&\multicolumn{1}{c|}{0.7035}&\multicolumn{1}{c|}{0.7127} \\
! 66:
! 67: $Zjj+jets\rightarrow$ $\mu\mu+jj+jets$ &\multicolumn{1}{c|}{0.6641} &\multicolumn{1}{c|}{0.7233}&\multicolumn{1}{c|}{0.7520}&\multicolumn{1}{c|}{0.7598} \\
! 68:
! 69: $Zbb+jets\rightarrow$ $\mu\mu+bb+jets$ &\multicolumn{1}{c|}{0.6057} &\multicolumn{1}{c|}{0.6598}&\multicolumn{1}{c|}{0.6860}&\multicolumn{1}{c|}{0.6931} \\
! 70:
! 71: $Zcc+jets\rightarrow$ $\mu\mu+cc+jets$ &\multicolumn{1}{c|}{0.5817} &\multicolumn{1}{c|}{0.6335}&\multicolumn{1}{c|}{0.6585}&\multicolumn{1}{c|}{0.6653} \\
! 72:
! 73: $Zjj+jets\rightarrow$ $\tau\tau+jj+jets$ &\multicolumn{1}{c|}{0.5712} &\multicolumn{1}{c|}{0.6220}&\multicolumn{1}{c|}{0.6465}&\multicolumn{1}{c|}{0.6530} \\
! 74:
! 75: $Zbb+jets\rightarrow$ $\tau\tau+bb+jets$ &\multicolumn{1}{c|}{0.6049} &\multicolumn{1}{c|}{0.6586}&\multicolumn{1}{c|}{0.6845}&\multicolumn{1}{c|}{0.6914} \\
! 76:
! 77: $Zcc+jets\rightarrow$ $\tau\tau+cc+jets$ &\multicolumn{1}{c|}{0.5889} &\multicolumn{1}{c|}{0.6410}&\multicolumn{1}{c|}{0.6661}&\multicolumn{1}{c|}{0.6727} \\
! 78:
! 79: $Zjj+jets\rightarrow$ $\nu\nu+jj+jets$ &\multicolumn{1}{c|}{0.5739}&\multicolumn{1}{c|}{0.6241}&\multicolumn{1}{c|}{0.6480}&\multicolumn{1}{c|}{0.6541} \\
! 80:
! 81: $Zbb+jets\rightarrow$ $\nu\nu+bb+jets$ &\multicolumn{1}{c|}{0.6012} &\multicolumn{1}{c|}{0.6539}&\multicolumn{1}{c|}{0.6790}&\multicolumn{1}{c|}{0.6854} \\
! 82:
! 83: $Zcc+jets\rightarrow$ $\nu\nu+cc+jets$ &\multicolumn{1}{c|}{0.6360}&\multicolumn{1}{c|}{0.6914}&\multicolumn{1}{c|}{0.7177}&\multicolumn{1}{c|}{0.7242} \\ \hline
! 84: \end{tabular}
! 85: \caption{Mean values of the trigger weight for all MC samples.}
! 86: \end{center}
! 87: \label{trig_weight}
! 88: \end{table}
! 89:
! 90:
! 91: For this trigger we also measured the luminosity of our
! 92: data sample. Table \ref{lumi} shows the results for both v15 and v16 trigger versions.
! 93:
! 94: %\newpage
! 95: %
! 96: \begin{table}[h]
! 97: %\begin{ruledtabular}
! 98: \begin{tabular}{|crrrr|}
! 99: %\begin{center}
! 100: \hline
! 101: Trigger version&
! 102: Trigger name&
! 103: Delivered $\mathcal{L}$ ($pb^{-1})$&
! 104: Recorded $\mathcal{L}$ ($pb^{-1})$&
! 105: Reconstructed $\mathcal{L}$ ($pb^{-1})$
! 106: \tabularnewline
! 107: \hline
! 108: \hline
! 109: V15.0 - V15.99& JT2\_3JT15L\_IP\_VX& 1682.08& 1544.71& 1385.99
! 110: \tabularnewline
! 111: V16.0 - V16.99& JT2\_3JT15L\_IP\_VX& 4059.92& 3887.95& 3565.86
! 112: \tabularnewline
! 113: \hline
! 114: T O T A L& & 5742.00& 5432.66& 4951.85
! 115: \tabularnewline
! 116: \hline
! 117: %\end{center}
! 118: \end{tabular}
! 119: %\end{ruledtabular}
! 120: \caption{The results of luminosity calculation for the Run2b 3JET data skim for different D0 trigger list versions}
! 121: \label{lumi}
! 122: \end{table}
! 123:
! 124: \newpage
! 125:
! 126: \subsection{\label{sub:background}\boldmath Backgrounds}
! 127:
! 128: In this analysis the largest background sources are QCD ({}``fake
! 129: $\tau$''), which is estimated from data and $W/Z$+jets, which are simulated Monte Carlo samples.
! 130: Other backgrounds that were not included in this analysis due to their small contribution are single top and diboson production.
! 131: A list of backgrounds sources is found in Section III of \cite{p17_note}.
! 132: In the following sections we describe both signal and background simulation.
! 133:
! 134:
! 135: \subsection{\label{sub:mcsample}\boldmath Monte Carlo Samples}
! 136:
! 137: \noindent We use p20 certified MC samples as produced by CSG and caffed with p21.11.00 (version3) \cite{3jet_mc}.
! 138: All $W/Z$ and $t\bar{t}$ were
! 139: generated with ALPGEN v2.11 \cite{alpgen} interfaced with Pythia v6.409 \cite{pythia}
! 140: for production of parton-level showers and hadronization.
! 141: EvtGen \cite{evtgen} is used to model b hadrons decays and TAUOLA \cite{tauola} used to model tau leptons decays.
! 142:
! 143:
! 144: \noindent ALPGEN is a leading order (LL) generator. In order to correct it to match with
! 145: next-to-leading order (NLO) cross sections we apply {\it correction factors} and then provide
! 146: a correct normalization. These correction factors were taken from {\tt vjets$\_$cafe} framework and are described
! 147: in Ref.\cite{kfactor}. There are two kinds of correction factors: {\it k-factors}, which
! 148: are the result of the ratio between NLO and LL cross sections ($\sigma_{NLO}/\sigma_{LL}$) and
! 149: {\it heavy flavor factors}, which are in turn the ratio between k-factors for $HF+0lp(incl)$
! 150: and $2lp(incl)$ process from MCFM \cite{mcfm}. Here $HF$ denotes $Z + bb$, $Z + cc$, $W + bb$ or $W + cc$ and $lp$ stands
! 151: for {\it light parton}. Heavy flavor factors are applied on the top of k-factors in order to provide the correct
! 152: normalization for process where heavy quarks are present.
! 153: For $Z$ production, samples are split
! 154: into $Z$ + light jets, $Z + bb$ and $Z + cc$. $Z$ + light parton
! 155: cross sections are multiplied by a k-factor of 1.3, while $Z + bb$ and $Z+ cc$ are multiplied by additional
! 156: heavy flavor factors of 1.52 and 1.67 respectively.
! 157: $W$ + jets samples are also split the same way: $W$ + light jets, $W + bb$ and $W + cc$. In $W$ + light jets
! 158: case a k-factor of 1.3 is applied while an additional heavy flavor factor of 1.47 is applied to
! 159: both $W + bb$ and $W + cc$ samples.
! 160: %Table \ref{kxsec} summarizes factors applied.
! 161:
! 162: Table IV summarizes the correction factors applied.
! 163:
! 164: \begin{table}[htbp]
! 165: \begin{center}
! 166: \begin{tabular}{|c|r|} \hline
! 167: Process & k-factor \\ \hline
! 168:
! 169: \hline
! 170:
! 171:
! 172: W + light partons & \multicolumn{1}{c|}{1.3} \\ \hline
! 173:
! 174:
! 175: W + bb & \multicolumn{1}{c|}{1.3$\times$1.47} \\ \hline
! 176:
! 177:
! 178: W + cc & \multicolumn{1}{c|}{1.3$\times$1.47} \\ \hline
! 179:
! 180:
! 181: Z + light partons & \multicolumn{1}{c|}{1.3} \\ \hline
! 182:
! 183:
! 184: Z + bb & \multicolumn{1}{c|}{1.3$\times$1.52} \\ \hline
! 185:
! 186:
! 187: Z + cc & \multicolumn{1}{c|}{1.3$\times$1.67} \\ \hline
! 188:
! 189: \end{tabular}
! 190: \caption{k-factors for MC.}
! 191: \end{center}
! 192: \label{kxsec}
! 193: \end{table}
! 194:
! 195: All MC samples used in this analysis are shown in Table \ref{used_mc} with theirs respective cross sections
! 196: and number of events. The cross sections shown are the averages of the cross-sections of
! 197: each set of MC process generated and are calculated from /caf$\_$mc$\_$util/mc$\_$sample$\_$info/MC.list
! 198:
! 199: \clearpage
! 200:
! 201: \begin{table}[h]
! 202: %\begin{center}
! 203: \begin{tabular}{|crr|}
! 204: \hline
! 205: Sample & $\sigma(pb)$ & \# of Events \\ \hline
! 206: $t+t+0lp-l\nu+2b+2lpc\_\mbox{excl}\_m172$ & 1.392196 & $ 793267 $ \\
! 207: $t+t+1lp-l\nu+2b+3lpc\_\mbox{excl}\_m172$ & .576927 & $ 456317 $ \\
! 208: $t+t+2lp-l\nu+2b+4lpc\_\mbox{incl}\_m172$ & .281831 & $ 277912 $ \\
! 209: $\mbox{W}+0lp\rightarrow lnu+0lp\_\mbox{excl}$ & 4530.269741 & $ 47070044 $ \\
! 210: $\mbox{W}+1lp\rightarrow lnu+1lp\_\mbox{excl}$ & 1283.094130 & $ 20683540 $ \\
! 211: $\mbox{W}+2lp\rightarrow lnu+2lp\_\mbox{excl}$ & 306.073315 & $ 19686862 $ \\
! 212: $\mbox{W}+3lp\rightarrow lnu+3lp\_\mbox{excl}$ & 73.494491 & $ 4269023 $ \\
! 213: $\mbox{W}+4lp\rightarrow lnu+4lp\_\mbox{excl}$ & 16.958254 & $ 3084707 $\\
! 214: $\mbox{W}+5lp\rightarrow lnu+5lp\_\mbox{incl}$ & 5.218917 & $ 2565942 $ \\
! 215: $\mbox{W}+2b+0lp\rightarrow l\nu+2b+0lp\_\mbox{excl}$ & 9.315458 & $ 1120570 $ \\
! 216: $\mbox{W}+2b+1lp\rightarrow l\nu+2b+1lp\_\mbox{excl}$ & 4.288365 & $ 812095 $ \\
! 217: $\mbox{W}+2b+2lp\rightarrow l\nu+2b+2lp\_\mbox{excl}$ & 1.554786 & $ 563315 $ \\
! 218: $\mbox{W}+2b+3lp\rightarrow l\nu+2b+3lp\_\mbox{incl}$ & 0.716175& $ 464475 $ \\
! 219: $\mbox{W}+2b+0lp\rightarrow l\nu+2c+0lp\_\mbox{excl}$ & 24.404153 & $ 934253 $ \\
! 220: $\mbox{W}+2b+1lp\rightarrow l\nu+2c+1lp\_\mbox{excl}$ & 13.486806 & $ 738709 $ \\
! 221: $\mbox{W}+2b+2lp\rightarrow l\nu+2c+2lp\_\mbox{excl}$ & 5.459005 & $ 554236 $ \\
! 222: $\mbox{W}+2b+3lp\rightarrow l\nu+2c+3lp\_\mbox{incl}$ & 2.526973 & $ 469900 $ \\
! 223: $\gamma \mbox{Z}+0lp\rightarrow ee+0lp\_\mbox{excl}\_75\_130$ & 132.086811 & $ 1212214 $ \\
! 224: $\gamma \mbox{Z}+1lp\rightarrow ee+1lp\_\mbox{excl}\_75\_130$ & 40.060963 & $ 599588 $ \\
! 225: $\gamma \mbox{Z}+2lp\rightarrow ee+2lp\_\mbox{excl}\_75\_130$ & 9.981935 & $ 298494 $ \\
! 226: $\gamma \mbox{Z}+3lp\rightarrow ee+3lp\_\mbox{incl}\_75\_130$ & 3.297072 & $ 150267 $ \\
! 227: $\gamma \mbox{Z}+2b+0lp\rightarrow ee+2b+0lp\_\mbox{excl}\_75\_130$ & 0.400826 & $ 200121 $ \\
! 228: $\gamma \mbox{Z}+2b+1lp\rightarrow ee+2b+1lp\_\mbox{excl}\_75\_130$ & 0.173438 & $ 97474 $ \\
! 229: $\gamma \mbox{Z}+2b+2lp\rightarrow ee+2b+2lp\_\mbox{incl}\_75\_130$ & 0.107248 & $ 48269 $ \\
! 230: $\gamma \mbox{Z}+2c+0lp\rightarrow ee+2c+0lp\_\mbox{excl}\_75\_130$ & 0.900923 & $ 182485 $ \\
! 231: $\gamma \mbox{Z}+2c+1lp\rightarrow ee+2c+1lp\_\mbox{excl}\_75\_130$ & 0.506337 & $ 89293 $ \\
! 232: $\gamma \mbox{Z}+2b+2lp\rightarrow ee+2b+2lp\_\mbox{incl}\_75\_130$ & 0.285871 & $ 47357 $ \\
! 233: $\gamma \mbox{Z}+0lp\rightarrow \mu \mu+0lp\_\mbox{excl}\_75\_130$ & 133.850906 & $ 1553222 $ \\
! 234: $\gamma \mbox{Z}+1lp\rightarrow \mu \mu+1lp\_\mbox{excl}\_75\_130$ & 41.677185 & $ 639392 $ \\
! 235: $\gamma \mbox{Z}+2lp\rightarrow \mu \mu+2lp\_\mbox{excl}\_75\_130$ & 9.822132 & $ 446737 $ \\
! 236: $\gamma \mbox{Z}+3lp\rightarrow \mu \mu+3lp\_\mbox{incl}\_75\_130$ & 3.195801 & $ 172628 $ \\
! 237: $\gamma \mbox{Z}+2b+0lp\rightarrow \mu \mu+2b+0lp\_\mbox{excl}\_75\_130$ & 0.424239 & $ 210139 $ \\
! 238: $\gamma \mbox{Z}+2b+1lp\rightarrow \mu \mu+2b+1lp\_\mbox{excl}\_75\_130$ & 0.195271 & $ 101055 $ \\
! 239: $\gamma \mbox{Z}+2b+2lp\rightarrow \mu \mu+2b+2lp\_\mbox{incl}\_75\_130$ & 0.099004 & $ 49600 $ \\
! 240: $\gamma \mbox{Z}+2c+0lp\rightarrow \mu \mu+2c+0lp\_\mbox{excl}\_75\_130$ & 0.932203 & $ 193928 $ \\
! 241: $\gamma \mbox{Z}+2c+1lp\rightarrow \mu \mu+2c+1lp\_\mbox{excl}\_75\_130$ & 0.548182 & $ 92744 $ \\
! 242: $\gamma \mbox{Z}+2b+2lp\rightarrow \mu \mu+2b+2lp\_\mbox{incl}\_75\_130$ & 0.280795 & $ 51277 $ \\
! 243: $\gamma \mbox{Z}+0lp\rightarrow \tau \tau+0lp\_\mbox{excl}\_75\_130$ & 131.564780 & $ 1556389 $ \\
! 244: $\gamma \mbox{Z}+1lp\rightarrow \tau \tau+1lp\_\mbox{excl}\_75\_130$ & 40.300291 & $ 595169 $ \\
! 245: $\gamma \mbox{Z}+2lp\rightarrow \tau \tau+2lp\_\mbox{excl}\_75\_130$ & 10.072067 & $ 305312 $ \\
! 246: $\gamma \mbox{Z}+3lp\rightarrow \tau \tau+3lp\_\mbox{excl}\_75\_130$ & 3.089442 & $ 205365 $ \\
! 247: $\gamma \mbox{Z}+2b+0lp\rightarrow \tau \tau+2b+0lp\_\mbox{excl}\_75\_130$ & 0.423679 & $ 196943 $ \\
! 248: $\gamma \mbox{Z}+2b+1lp\rightarrow \tau \tau+2b+1lp\_\mbox{excl}\_75\_130$ & 0.196527 & $ 103105 $ \\
! 249: $\gamma \mbox{Z}+2b+2lp\rightarrow \tau \tau+2b+2lp\_\mbox{incl}\_75\_130$ & 0.103561 & $ 48476 $ \\
! 250: $\gamma \mbox{Z}+2c+0lp\rightarrow \tau \tau+2c+0lp\_\mbox{excl}\_75\_130$ & 0.898135 & $ 260243 $ \\
! 251: $\gamma \mbox{Z}+2c+1lp\rightarrow \tau \tau+2c+1lp\_\mbox{excl}\_75\_130$ & 0.487548 & $ 100802 $ \\
! 252: $\gamma \mbox{Z}+2b+2lp\rightarrow \tau \tau+2b+2lp\_\mbox{incl}\_75\_130$ & 0.297808 & $ 50711 $ \\
! 253: $\gamma \mbox{Z}+0lp\rightarrow \nu \nu+0lp\_\mbox{excl}$ & 806.552968 & $ 2368495 $ \\
! 254: $\gamma \mbox{Z}+1lp\rightarrow \nu \nu+1lp\_\mbox{excl}$ & 244.651772 & $ 2591505 $ \\
! 255: $\gamma \mbox{Z}+2lp\rightarrow \nu \nu+2lp\_\mbox{excl}$ & 61.014112 & $ 657110 $ \\
! 256: $\gamma \mbox{Z}+3lp\rightarrow \nu \nu+3lp\_\mbox{excl}$ & 14.091090 & $ 194705 $ \\
! 257: $\gamma \mbox{Z}+4lp\rightarrow \nu \nu+4lp\_\mbox{excl}$ & 3.277295 & $ 100158 $ \\
! 258: $\gamma \mbox{Z}+5lp\rightarrow \nu \nu+5lp\_\mbox{incl}$ & 0.936465 & $ 49660 $ \\
! 259: $\gamma \mbox{Z}+2b+0lp\rightarrow \nu \nu+2b+0lp\_\mbox{excl}$ & 2.562976 & $ 375572$ \\
! 260: $\gamma \mbox{Z}+2b+1lp\rightarrow \nu \nu+2b+1lp\_\mbox{excl}$ & 1.143703 & $ 180558 $ \\
! 261: $\gamma \mbox{Z}+2b+2lp\rightarrow \nu \nu+2b+2lp\_\mbox{incl}$ & 0.617265 & $ 91588 $ \\
! 262: $\gamma \mbox{Z}+2c+0lp\rightarrow \nu \nu+2c+0lp\_\mbox{excl}$ & 5.634504 & $ 376456 $ \\
! 263: $\gamma \mbox{Z}+2c+1lp\rightarrow \nu \nu+2c+1lp\_\mbox{excl}$ & 3.002712 & $ 199012 $ \\
! 264: $\gamma \mbox{Z}+2b+2lp\rightarrow \nu \nu+2b+2lp\_\mbox{incl}$ & 1.635746 & $ 96147 $ \\\hline
! 265:
! 266: \end{tabular}
! 267: \caption{MC Samples. Here $l$ stands for the three lepton flavor ($e$, $\mu$ and $\tau$). $\tau$ decays are not restricted.}
! 268: %\end{center}
! 269: \label{used_mc}
! 270: \end{table}
! 271:
! 272: \clearpage
! 273:
! 274: \subsection{\label{sub:mcsample_xseccorr}\boldmath MC samples corrections}
! 275:
! 276: Standard D\O\ corrections are applied to MC in order to obtain a better MC-data agreement \cite{top_sys}.
! 277:
! 278:
! 279: \noindent {\bf Trigger efficiency}: an additional scale factor (weight) is applied to MC to account for the trigger efficiency in data.
! 280: Further details are given in Section \ref{sec:trig_param}.
! 281:
! 282: \noindent {\bf Luminosity reweighting}: in order to reproduce luminosity effects from real data, simulated samples are overlaid to Zero Bias data
! 283: Due to a difference in intantaneous luminosity between the overlay and real data, the luminosity profile of all
! 284: MC samples is reweighted to match the luminosity profile in data \cite{lumireweight}.
! 285:
! 286: \noindent {\bf Primary vertex reweighting}: $z$ vertex distributions are different between data and MC.This difference is corrected by reweighting
! 287: MC $z$ vertex distributions using the reweight processor from the {\tt caf\_mc\_util} package \cite{PVz_re}.
! 288:
! 289: \noindent {\bf $W$ and $Z$ $p_{T}$ reweighting}: for both $W$ + jets and $Z$ + jets, the $p_{T}$ distribution from MC samples is reweighted to match
! 290: the equivalent distribution in data, accordingly to the standard way \cite{WZPt_re}.
! 291:
! 292: \noindent {\bf b fragmentation}: the systematics on the reweight of the b-fragmentation function from the default in Pythia
! 293: to the value tuned to reproduce collider data was assumed to be the symmetrized difference between
! 294: the AOD and SLD tunes \cite{bfrag}.
! 295:
! 296: \noindent {\bf Jet Shifting Smearing and Removing (JSSR)}: due to differences in energy scale, resolution, reconstruction and identification
! 297: between data and MC, MC jets are shifted, smeared and possibly removed using standard JSSR
! 298: processor \cite{jssr}. In this analysis shifting is turned off to signal $t\bar{t}$
! 299: and on to $W/Z$ + jets samples.
! 300:
! 301:
! 302: \noindent {\bf Tau Energy Scale (TES)}: due to the analysis sensitivity to any difference between data and MC
! 303: in the energy scale of taus decaying hadronically we apply a $E/p$ correction to this energy scale
! 304: as described in \cite{tes}.
! 305:
! 306: %\subsubsection{\label{sub:hadtau_corr}\boldmath Hadronic $\tau$ corrections}
! 307:
! 308: %\begin{itemize}
! 309: %\item E/p correction for hadronic tau relative tau energy scale from package {\tt caf\_util}.
! 310: %\item NN corrections from package {\tt tauid\_eff}.
! 311: %\item Track corrections from package {\tt muid\_eff}.
! 312: %\end{itemize}
! 313:
! 314:
! 315:
! 316: %\clearpage
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/small/back.gif){kind=icon}
Return to Dataset.tex CVS log ![[TXT]](/icons/small/text.gif){kind=icon}
![[DIR]](/icons/small/dir.gif){kind=icon}
Up to [Nicadd] / ttbar / p20_taujets_note