Annotation of ttbar/p20_taujets_note/Dataset.tex, revision 1.2
1.1 uid12904 1: %\newpage
2:
3: \section{Dataset \label{sec:dataset}}
4:
5: \subsection{\label{sub:datasample}\boldmath Data Sample}
6:
1.2 ! uid12904 7: \noindent For this analysis we used the vjets\_cafe v04-00-08 framework (Release p21.18.00)
1.1 uid12904 8: and the data set consisted of 3JET skim produced by the commom samples group
1.2 ! uid12904 9: and recorded between August 2002 and May 2010 (runs 151817 - 258547) \cite{3jet_data}.
1.1 uid12904 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
1.2 ! uid12904 29: the fact that it represents a gain of 10\% efficiency on signal selection if compared to previous p17 analysis.
! 30: Since the efficiency of this trigger is not part of caf\_trigger package,
1.1 uid12904 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}:
1.2 ! uid12904 35: Appendix \ref{app:trig_eff} and Table 2 summarizes their mean values:
1.1 uid12904 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:
1.2 ! uid12904 55: $Wjj+jets\rightarrow$ $\ell\nu+jj+jets$ &\multicolumn{1}{c|}{0.5821} &\multicolumn{1}{c|}{0.6337} &\multicolumn{1}{c|}{0.6586}&\multicolumn{1}{c|}{0.6652} \\
1.1 uid12904 56:
1.2 ! uid12904 57: $Wbb+jets\rightarrow$ $\ell\nu+bb+jets$ &\multicolumn{1}{c|}{0.5948} &\multicolumn{1}{c|}{0.6475}&\multicolumn{1}{c|}{0.6729}&\multicolumn{1}{c|}{0.6796} \\
1.1 uid12904 58:
1.2 ! uid12904 59: $Wcc+jets\rightarrow$ $\ell\nu+cc+jets$ &\multicolumn{1}{c|}{0.5912} &\multicolumn{1}{c|}{0.6435}&\multicolumn{1}{c|}{0.6687}&\multicolumn{1}{c|}{0.6754} \\
1.1 uid12904 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
1.2 ! uid12904 101: Trigger version &\multicolumn{1}{c}{Trigger name} &\multicolumn{1}{c}{Delivered $\mathcal{L}$ ($\mbox{pb}^{-1})$} &\multicolumn{1}{c}{Recorded $\mathcal{L}$ ($\mbox{pb}^{-1})$} &\multicolumn{1}{c|}{Reconstructed $\mathcal{L}$ ($\mbox{pb}^{-1})$}
! 102:
1.1 uid12904 103: \tabularnewline
104: \hline
105: \hline
1.2 ! uid12904 106: V15.0 - V15.99 &\multicolumn{1}{c}{JT2\_3JT15L\_IP\_VX} &\multicolumn{1}{c}{1682.08} &\multicolumn{1}{c}{1544.71} &\multicolumn{1}{c|}{1385.99}
1.1 uid12904 107: \tabularnewline
1.2 ! uid12904 108: V16.0 - V16.99 &\multicolumn{1}{c}{JT2\_3JT15L\_IP\_VX} &\multicolumn{1}{c}{4059.92} &\multicolumn{1}{c}{3887.95} &\multicolumn{1}{c|}{3565.86}
1.1 uid12904 109: \tabularnewline
110: \hline
1.2 ! uid12904 111: T O T A L &\multicolumn{1}{c}{} &\multicolumn{1}{c}{5742.00} &\multicolumn{1}{c}{5432.66} &\multicolumn{1}{c|}{4951.85}
1.1 uid12904 112: \tabularnewline
113: \hline
114: %\end{center}
115: \end{tabular}
116: %\end{ruledtabular}
1.2 ! uid12904 117: \caption{The results of luminosity calculation for the Run IIb 3JET data skim for different D0 trigger list versions}
1.1 uid12904 118: \label{lumi}
119: \end{table}
120:
1.2 ! uid12904 121: %\newpage
1.1 uid12904 122:
123: \subsection{\label{sub:background}\boldmath Backgrounds}
124:
1.2 ! uid12904 125: The largest sources of background to our signal are QCD ({}``fake
! 126: $\tau$'') and $W/Z$+jets. We estimate the first from data and the second using Monte Carlo simulation.
! 127: Other sources such as single top and diboson production are small enough to be ignored.
! 128: A list of backgrounds process is found in Section III of \cite{p17_note}.
1.1 uid12904 129: In the following sections we describe both signal and background simulation.
130:
131:
132: \subsection{\label{sub:mcsample}\boldmath Monte Carlo Samples}
133:
1.2 ! uid12904 134: \noindent We use p20 certified MC samples as produced by CSG and reconstructed with p21.11.00 (version3) \cite{3jet_mc}.
1.1 uid12904 135: All $W/Z$ and $t\bar{t}$ were
136: generated with ALPGEN v2.11 \cite{alpgen} interfaced with Pythia v6.409 \cite{pythia}
137: for production of parton-level showers and hadronization.
1.2 ! uid12904 138: EvtGen \cite{evtgen} is used to model b hadrons decays and TAUOLA \cite{tauola} is used to model tau leptons decays.
1.1 uid12904 139:
140:
141: \noindent ALPGEN is a leading order (LL) generator. In order to correct it to match with
1.2 ! uid12904 142: next-to-leading order (NLO) cross sections we apply correction factors to MC samples in order to get
! 143: the correct normalization. These correction factors were taken from {\tt vjets$\_$cafe} framework and are described
1.1 uid12904 144: in Ref.\cite{kfactor}. There are two kinds of correction factors: {\it k-factors}, which
1.2 ! uid12904 145: are the result of the ratio between NLO and LO cross sections ($\sigma_{NLO}/\sigma_{LO}$) and
1.1 uid12904 146: {\it heavy flavor factors}, which are in turn the ratio between k-factors for $HF+0lp(incl)$
147: and $2lp(incl)$ process from MCFM \cite{mcfm}. Here $HF$ denotes $Z + bb$, $Z + cc$, $W + bb$ or $W + cc$ and $lp$ stands
1.2 ! uid12904 148: for {\it light parton}. Heavy flavor factors are applied on top of k-factors in order to provide the correct
! 149: normalization for processes where heavy quarks are present.
1.1 uid12904 150: For $Z$ production, samples are split
151: into $Z$ + light jets, $Z + bb$ and $Z + cc$. $Z$ + light parton
152: cross sections are multiplied by a k-factor of 1.3, while $Z + bb$ and $Z+ cc$ are multiplied by additional
153: heavy flavor factors of 1.52 and 1.67 respectively.
154: $W$ + jets samples are also split the same way: $W$ + light jets, $W + bb$ and $W + cc$. In $W$ + light jets
155: case a k-factor of 1.3 is applied while an additional heavy flavor factor of 1.47 is applied to
156: both $W + bb$ and $W + cc$ samples.
157: %Table \ref{kxsec} summarizes factors applied.
158:
1.2 ! uid12904 159: Table 4 summarizes the correction factors applied.
1.1 uid12904 160:
161: \begin{table}[htbp]
162: \begin{center}
163: \begin{tabular}{|c|r|} \hline
1.2 ! uid12904 164: Process & correction factor \\ \hline
1.1 uid12904 165:
166: \hline
167:
168:
1.2 ! uid12904 169: $W$ + light partons & \multicolumn{1}{c|}{1.3} \\ \hline
1.1 uid12904 170:
171:
1.2 ! uid12904 172: $W + bb$ & \multicolumn{1}{c|}{1.3$\times$1.47} \\ \hline
1.1 uid12904 173:
174:
1.2 ! uid12904 175: $W + cc$ & \multicolumn{1}{c|}{1.3$\times$1.47} \\ \hline
1.1 uid12904 176:
177:
1.2 ! uid12904 178: $Z$ + light partons & \multicolumn{1}{c|}{1.3} \\ \hline
1.1 uid12904 179:
180:
1.2 ! uid12904 181: $Z + bb$ & \multicolumn{1}{c|}{1.3$\times$1.52} \\ \hline
1.1 uid12904 182:
183:
1.2 ! uid12904 184: $Z + cc$ & \multicolumn{1}{c|}{1.3$\times$1.67} \\ \hline
1.1 uid12904 185:
186: \end{tabular}
187: \caption{k-factors for MC.}
188: \end{center}
189: \label{kxsec}
190: \end{table}
191:
1.2 ! uid12904 192: All MC samples used in this analysis are shown in Table \ref{used_mc} with their respective cross sections
! 193: and number of events. The cross sections shown are the averages of the cross sections of
! 194: each set of MC process generated and are calculated from /caf$\_$mc$\_$util/mc$\_$sample$\_$info/MC.list \cite{caf_mc_util}.
1.1 uid12904 195:
196: \clearpage
197:
198: \begin{table}[h]
199: %\begin{center}
200: \begin{tabular}{|crr|}
201: \hline
202: Sample & $\sigma(pb)$ & \# of Events \\ \hline
1.2 ! uid12904 203: $t\bar{t}+0lp-\ell\nu+b\bar{b}+2lpc\_\mbox{excl}\_m172.5$ & 1.392196 & $ 793267 $ \\
! 204: $t\bar{t}+1lp-\ell\nu+b\bar{b}+3lpc\_\mbox{excl}\_m172.5$ & .576927 & $ 456317 $ \\
! 205: $t\bar{t}+2lp-\ell\nu+b\bar{b}+4lpc\_\mbox{incl}\_m172.5$ & .281831 & $ 277912 $ \\
! 206: $W+0lp\rightarrow \ell\nu+0lp\_\mbox{excl}$ & 4530.269741 & $ 47070044 $ \\
! 207: $W+1lp\rightarrow \ell\nu+1lp\_\mbox{excl}$ & 1283.094130 & $ 20683540 $ \\
! 208: $W+2lp\rightarrow \ell\nu+2lp\_\mbox{excl}$ & 306.073315 & $ 19686862 $ \\
! 209: $W+3lp\rightarrow \ell\nu+3lp\_\mbox{excl}$ & 73.494491 & $ 4269023 $ \\
! 210: $W+4lp\rightarrow \ell\nu+4lp\_\mbox{excl}$ & 16.958254 & $ 3084707 $\\
! 211: $W+5lp\rightarrow \ell\nu+5lp\_\mbox{incl}$ & 5.218917 & $ 2565942 $ \\
! 212: $W+b\bar{b}+0lp\rightarrow \ell\nu+b\bar{b}+0lp\_\mbox{excl}$ & 9.315458 & $ 1120570 $ \\
! 213: $W+b\bar{b}+1lp\rightarrow \ell\nu+b\bar{b}+1lp\_\mbox{excl}$ & 4.288365 & $ 812095 $ \\
! 214: $W+b\bar{b}+2lp\rightarrow \ell\nu+b\bar{b}+2lp\_\mbox{excl}$ & 1.554786 & $ 563315 $ \\
! 215: $W+b\bar{b}+3lp\rightarrow \ell\nu+b\bar{b}+3lp\_\mbox{incl}$ & 0.716175& $ 464475 $ \\
! 216: $W+c\bar{c}+0lp\rightarrow \ell\nu+c\bar{c}+0lp\_\mbox{excl}$ & 24.404153 & $ 934253 $ \\
! 217: $W+c\bar{c}+1lp\rightarrow \ell\nu+c\bar{c}+1lp\_\mbox{excl}$ & 13.486806 & $ 738709 $ \\
! 218: $W+c\bar{c}+2lp\rightarrow \ell\nu+c\bar{c}+2lp\_\mbox{excl}$ & 5.459005 & $ 554236 $ \\
! 219: $W+c\bar{c}+3lp\rightarrow \ell\nu+c\bar{c}+3lp\_\mbox{incl}$ & 2.526973 & $ 469900 $ \\
! 220: $\gamma /Z+0lp\rightarrow ee+0lp\_\mbox{excl}\_75\_130$ & 132.086811 & $ 1212214 $ \\
! 221: $\gamma /Z+1lp\rightarrow ee+1lp\_\mbox{excl}\_75\_130$ & 40.060963 & $ 599588 $ \\
! 222: $\gamma /Z+2lp\rightarrow ee+2lp\_\mbox{excl}\_75\_130$ & 9.981935 & $ 298494 $ \\
! 223: $\gamma /Z+3lp\rightarrow ee+3lp\_\mbox{incl}\_75\_130$ & 3.297072 & $ 150267 $ \\
! 224: $\gamma /Z+b\bar{b}+0lp\rightarrow ee+b\bar{b}+0lp\_\mbox{excl}\_75\_130$ & 0.400826 & $ 200121 $ \\
! 225: $\gamma /Z+b\bar{b}+1lp\rightarrow ee+b\bar{b}+1lp\_\mbox{excl}\_75\_130$ & 0.173438 & $ 97474 $ \\
! 226: $\gamma /Z+b\bar{b}+2lp\rightarrow ee+b\bar{b}+2lp\_\mbox{incl}\_75\_130$ & 0.107248 & $ 48269 $ \\
! 227: $\gamma /Z+c\bar{c}+0lp\rightarrow ee+c\bar{c}+0lp\_\mbox{excl}\_75\_130$ & 0.900923 & $ 182485 $ \\
! 228: $\gamma /Z+c\bar{c}+1lp\rightarrow ee+c\bar{c}+1lp\_\mbox{excl}\_75\_130$ & 0.506337 & $ 89293 $ \\
! 229: $\gamma /Z+c\bar{c}+2lp\rightarrow ee+c\bar{c}+2lp\_\mbox{incl}\_75\_130$ & 0.285871 & $ 47357 $ \\
! 230: $\gamma /Z+0lp\rightarrow \mu \mu+0lp\_\mbox{excl}\_75\_130$ & 133.850906 & $ 1553222 $ \\
! 231: $\gamma /Z+1lp\rightarrow \mu \mu+1lp\_\mbox{excl}\_75\_130$ & 41.677185 & $ 639392 $ \\
! 232: $\gamma /Z+2lp\rightarrow \mu \mu+2lp\_\mbox{excl}\_75\_130$ & 9.822132 & $ 446737 $ \\
! 233: $\gamma /Z+3lp\rightarrow \mu \mu+3lp\_\mbox{incl}\_75\_130$ & 3.195801 & $ 172628 $ \\
! 234: $\gamma /Z+b\bar{b}+0lp\rightarrow \mu \mu+b\bar{b}+0lp\_\mbox{excl}\_75\_130$ & 0.424239 & $ 210139 $ \\
! 235: $\gamma /Z+b\bar{b}+1lp\rightarrow \mu \mu+b\bar{b}+1lp\_\mbox{excl}\_75\_130$ & 0.195271 & $ 101055 $ \\
! 236: $\gamma /Z+b\bar{b}+2lp\rightarrow \mu \mu+b\bar{b}+2lp\_\mbox{incl}\_75\_130$ & 0.099004 & $ 49600 $ \\
! 237: $\gamma /Z+c\bar{c}+0lp\rightarrow \mu \mu+c\bar{c}+0lp\_\mbox{excl}\_75\_130$ & 0.932203 & $ 193928 $ \\
! 238: $\gamma /Z+c\bar{c}+1lp\rightarrow \mu \mu+c\bar{c}+1lp\_\mbox{excl}\_75\_130$ & 0.548182 & $ 92744 $ \\
! 239: $\gamma /Z+c\bar{c}+2lp\rightarrow \mu \mu+c\bar{c}+2lp\_\mbox{incl}\_75\_130$ & 0.280795 & $ 51277 $ \\
! 240: $\gamma /Z+0lp\rightarrow \tau \tau+0lp\_\mbox{excl}\_75\_130$ & 131.564780 & $ 1556389 $ \\
! 241: $\gamma /Z+1lp\rightarrow \tau \tau+1lp\_\mbox{excl}\_75\_130$ & 40.300291 & $ 595169 $ \\
! 242: $\gamma /Z+2lp\rightarrow \tau \tau+2lp\_\mbox{excl}\_75\_130$ & 10.072067 & $ 305312 $ \\
! 243: $\gamma /Z+3lp\rightarrow \tau \tau+3lp\_\mbox{excl}\_75\_130$ & 3.089442 & $ 205365 $ \\
! 244: $\gamma /Z+b\bar{b}+0lp\rightarrow \tau \tau+b\bar{b}+0lp\_\mbox{excl}\_75\_130$ & 0.423679 & $ 196943 $ \\
! 245: $\gamma /Z+b\bar{b}+1lp\rightarrow \tau \tau+b\bar{b}+1lp\_\mbox{excl}\_75\_130$ & 0.196527 & $ 103105 $ \\
! 246: $\gamma /Z+b\bar{b}+2lp\rightarrow \tau \tau+b\bar{b}+2lp\_\mbox{incl}\_75\_130$ & 0.103561 & $ 48476 $ \\
! 247: $\gamma /Z+c\bar{c}+0lp\rightarrow \tau \tau+c\bar{c}+0lp\_\mbox{excl}\_75\_130$ & 0.898135 & $ 260243 $ \\
! 248: $\gamma /Z+c\bar{c}+1lp\rightarrow \tau \tau+c\bar{c}+1lp\_\mbox{excl}\_75\_130$ & 0.487548 & $ 100802 $ \\
! 249: $\gamma /Z+c\bar{c}+2lp\rightarrow \tau \tau+c\bar{c}+2lp\_\mbox{incl}\_75\_130$ & 0.297808 & $ 50711 $ \\
! 250: $Z+0lp\rightarrow \nu \nu+0lp\_\mbox{excl}$ & 806.552968 & $ 2368495 $ \\
! 251: $Z+1lp\rightarrow \nu \nu+1lp\_\mbox{excl}$ & 244.651772 & $ 2591505 $ \\
! 252: $Z+2lp\rightarrow \nu \nu+2lp\_\mbox{excl}$ & 61.014112 & $ 657110 $ \\
! 253: $Z+3lp\rightarrow \nu \nu+3lp\_\mbox{excl}$ & 14.091090 & $ 194705 $ \\
! 254: $Z+4lp\rightarrow \nu \nu+4lp\_\mbox{excl}$ & 3.277295 & $ 100158 $ \\
! 255: $Z+5lp\rightarrow \nu \nu+5lp\_\mbox{incl}$ & 0.936465 & $ 49660 $ \\
! 256: $Z+b\bar{b}+0lp\rightarrow \nu \nu+b\bar{b}+0lp\_\mbox{excl}$ & 2.562976 & $ 375572$ \\
! 257: $Z+b\bar{b}+1lp\rightarrow \nu \nu+b\bar{b}+1lp\_\mbox{excl}$ & 1.143703 & $ 180558 $ \\
! 258: $Z+b\bar{b}+2lp\rightarrow \nu \nu+b\bar{b}+2lp\_\mbox{incl}$ & 0.617265 & $ 91588 $ \\
! 259: $Z+c\bar{c}+0lp\rightarrow \nu \nu+c\bar{c}+0lp\_\mbox{excl}$ & 5.634504 & $ 376456 $ \\
! 260: $Z+c\bar{c}+1lp\rightarrow \nu \nu+c\bar{c}+1lp\_\mbox{excl}$ & 3.002712 & $ 199012 $ \\
! 261: $Z+c\bar{c}+2lp\rightarrow \nu \nu+c\bar{c}+2lp\_\mbox{incl}$ & 1.635746 & $ 96147 $ \\\hline
1.1 uid12904 262:
263: \end{tabular}
264: \caption{MC Samples. Here $l$ stands for the three lepton flavor ($e$, $\mu$ and $\tau$). $\tau$ decays are not restricted.}
265: %\end{center}
266: \label{used_mc}
267: \end{table}
268:
269: \clearpage
270:
271: \subsection{\label{sub:mcsample_xseccorr}\boldmath MC samples corrections}
272:
1.2 ! uid12904 273: Standard D0 corrections are applied to MC in order to obtain a better MC-data agreement \cite{top_sys}.
1.1 uid12904 274:
275:
1.2 ! uid12904 276: \noindent {\bf Trigger efficiency}: an additional scale factor (weight) is applied to MC to account for the trigger
! 277: efficiency in data. Further details are given in Section \ref{sec:trig_param}.
1.1 uid12904 278:
1.2 ! uid12904 279: \noindent {\bf Luminosity reweighting}: properly model the occurence of multiple interactions
! 280: at higher instantaneous luminosities, simulated samples
! 281: are overlaid on Zero Bias data. Due to a difference in instantaneous luminosity between the overlay and
! 282: real data, the luminosity profile of all
1.1 uid12904 283: MC samples is reweighted to match the luminosity profile in data \cite{lumireweight}.
284:
1.2 ! uid12904 285: \noindent {\bf Primary vertex reweighting}: vertex $z$ distributions are different between data and MC.
! 286: This difference is corrected by reweighting
1.1 uid12904 287: MC $z$ vertex distributions using the reweight processor from the {\tt caf\_mc\_util} package \cite{PVz_re}.
288:
1.2 ! uid12904 289: \noindent {\bf $W$ and $Z$ $p_{T}$ reweighting}: for both $W$ + jets and $Z$ + jets, the $p_{T}$
! 290: distribution from MC samples is reweighted to match
! 291: the equivalent distributions in data, accordingly to the standard way \cite{WZPt_re}.
1.1 uid12904 292:
1.2 ! uid12904 293: \noindent {\bf $b$ fragmentation}: the systematics on the reweight of the b-fragmentation function from the default in Pythia
1.1 uid12904 294: to the value tuned to reproduce collider data was assumed to be the symmetrized difference between
295: the AOD and SLD tunes \cite{bfrag}.
296:
1.2 ! uid12904 297: \noindent {\bf Jet Shifting Smearing and Removal (JSSR)}: due to differences in energy scale, resolution,
! 298: reconstruction and identification
1.1 uid12904 299: between data and MC, MC jets are shifted, smeared and possibly removed using standard JSSR
1.2 ! uid12904 300: processor \cite{jssr}. In this analysis shifting is turned {\it off} to signal $t\bar{t}$
! 301: and {\it on} to $W/Z$ + jets samples.
1.1 uid12904 302:
303:
1.2 ! uid12904 304: \noindent {\bf Tau Energy Scale (TES)}: A $E/p$ correction is applied to the energy of the hadronically decaying
! 305: taus as described in \cite{tes}.
1.1 uid12904 306:
307: %\subsubsection{\label{sub:hadtau_corr}\boldmath Hadronic $\tau$ corrections}
308:
309: %\begin{itemize}
310: %\item E/p correction for hadronic tau relative tau energy scale from package {\tt caf\_util}.
311: %\item NN corrections from package {\tt tauid\_eff}.
312: %\item Track corrections from package {\tt muid\_eff}.
313: %\end{itemize}
314:
315:
316:
317: %\clearpage
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