cmsnotes/ZMet2012/yields.tex

\clearpage

\section{Data vs. MC Comparison in Preselection Region}
\label{sec:yields}

In this section we compare the data and MC samples passing the selection described in Sec.~\ref{sec:eventSelection}
In the following, the MC is reweighted to match the data distribution of number of reconstructed primary vertices
{\bf FIXME: UPDATE TO 5.1/fb VTX-REWEIGHTING, CURRENTLY USING OUTDATED FUNCTION}. 
The trigger efficiencies of Sec.~\ref{sec:datasets} are applied. In all plots, the last bin contains the overflow.

We begin by counting the inclusive Z yields. Here we require the presence of two selected leptons without
any additional requirements on jets or \MET. In Fig.~\ref{fig:dilmass} the distribution of dilepton invariant
mass in the ee and $\mu\mu$ channels is displayed. In Table~\ref{table:zyields} the yields for selected dilepton
events in the Z mass window are indicated. Good data vs. MC agreement is observed, within the systematic uncertainties
of integrated luminosity (4.5\%), trigger efficiency (3\%), \zjets\ and \ttbar\ cross sections.

\begin{figure}[hbt]
  \begin{center}
        \includegraphics[width=1.0\linewidth]{plots/dilmass_ee_mm.pdf}
        \caption{
          \label{fig:dilmass}\protect 
          Dilepton mass distribution for events with two selected leptons
          in the ee (left) and $\mu\mu$ (right) final states.}
  \end{center}
\end{figure}


\begin{table}[htb]
\begin{center}
\caption{\label{table:zyields} Data and Monte Carlo yields for events with two selected leptons in the Z mass window. 
}
\begin{tabular}{lccccc}
\hline
\hline
              Sample   &                ee   &            $\mu\mu$   &              e$\mu$   &         total         \\
\hline
         \zjets   & 1150211.5 $\pm$ 4886.0   & 1697568.1 $\pm$ 5680.2  &  281.5 $\pm$ 63.7   & 2848061.2 $\pm$ 7492.8  \\
         \ttbar   &     829.1 $\pm$ 20.0     &    1120.7 $\pm$ 22.6    & 1910.9 $\pm$ 29.7   &    3860.7 $\pm$ 42.4    \\
             WZ   &    1038.2 $\pm$ 3.6      &    1465.5 $\pm$ 4.1     &   29.5 $\pm$ 0.5    &    2533.2 $\pm$ 5.5     \\
             ZZ   &     658.0 $\pm$ 2.4      &     933.0 $\pm$ 2.7     &    2.7 $\pm$ 0.1    &    1593.7 $\pm$ 3.6     \\
             WW   &     146.7 $\pm$ 2.6      &     209.0 $\pm$ 2.9     &  358.9 $\pm$ 3.9    &     714.6 $\pm$ 5.5     \\
     single top   &      70.9 $\pm$ 4.9      &     103.3 $\pm$ 5.7     &  172.5 $\pm$ 7.4    &     346.7 $\pm$ 10.5    \\
\hline
    total SM MC   & 1152954.5 $\pm$ 4886.1   & 1701399.6 $\pm$ 5680.3   &2756.1 $\pm$ 70.8   & 2857110.2 $\pm$ 7493.0  \\
\hline
           data   &        1162229   &        1774353   &           3077   &        2939659  \\


\hline
\hline
\end{tabular}
\end{center}
\end{table}

\clearpage

We next define the preselection region for the inclusive search using the following requirements:
\begin{itemize}
\item Number of jets $\geq$ 2;
\item Same flavor dileptons (opposite flavor yields will be shown since they are used in data for the FS background estimation);
\item Dilepton invariant mass $81<m_{\ell\ell}<101$ GeV.
\end{itemize}

The dilepton mass distributions in the preselection region of the inclusive search (without the dilepton mass requirement applied) 
for the ee and $\mu\mu$ final states are shown in Figure~\ref{fig:dilmass_2j}. In Table~\ref{table:zyields_2j} the data and MC yields in the preselection
region are indicated. Good data vs. MC agreement is observed.


\begin{figure}[hbt]
  \begin{center}
        \includegraphics[width=1.0\linewidth]{plots/dilmass_ee_mm_2j.pdf}
        \caption{
          \label{fig:dilmass_2j}\protect 
          Dilepton mass distribution for events in the preselection region of the inclusive search
          in the ee (left) and $\mu\mu$ (right) final states.}
  \end{center}
\end{figure}

\begin{table}[htb]
\begin{center}
\caption{\label{table:zyields_2j} Data and MC yields in the preselection region of the inclusive search.
}
\begin{tabular}{lccccc}
\hline
\hline
         Sample   &           ee   &       $\mu\mu$   &         e$\mu$   &            total  \\
\hline
          \zjets   & 53187.8 $\pm$ 988.5   &78070.5 $\pm$ 1165.7   &  5.6 $\pm$ 3.6   &131264.0 $\pm$ 1528.4  \\
          \ttbar   &   645.3 $\pm$ 17.7   &865.1 $\pm$ 19.7   &1470.4 $\pm$ 25.8   &2980.8 $\pm$ 37.0  \\
             WZ   &   431.2 $\pm$ 2.4   &594.6 $\pm$ 2.7   &  5.8 $\pm$ 0.2   &1031.6 $\pm$ 3.6  \\
             ZZ   &   269.9 $\pm$ 1.6   &377.7 $\pm$ 1.8   &  0.5 $\pm$ 0.0   &648.1 $\pm$ 2.4  \\
             WW   &    15.2 $\pm$ 0.8   & 22.2 $\pm$ 0.9   & 38.9 $\pm$ 1.3   & 76.4 $\pm$ 1.7  \\
     single top   &    28.8 $\pm$ 3.2   & 38.0 $\pm$ 3.4   & 72.0 $\pm$ 4.9   &138.8 $\pm$ 6.7  \\
\hline
    total SM MC   & 54578.1 $\pm$ 988.7   &79968.3 $\pm$ 1165.9   &1593.3 $\pm$ 26.5   &136139.7 $\pm$ 1528.9  \\
\hline
           data   &          54426   &          80367   &           1565   &         136358  \\

\hline
\hline
\end{tabular}
\end{center}
\end{table}


\clearpage

We next define the preselection region for the targeted search by adding the following requirements:
\begin{itemize}
\item Veto events containing a b-tagged jet;
\item Dijet invariant mass $70<m_{jj}<110$ GeV;
\item Veto events containing a third selected lepton (electron or muon) with \pt $>$ 20 GeV {\bf FIXME: lower third lepton \pt threshold to 10 GeV}.
\end{itemize}

The rejection of events with a b-tagged jet strongly suppresses the \ttbar\ background, which is the dominant background in the inclusive search
after requiring large \MET. The requirement that the jet pair is consistent with originating from W/Z decay is motivated by the fact that we are 
searching for signatures producing V(jj)Z($\ell\ell$)+\MET; this requirement suppresses the \zjets\ and \ttbar\ backgrounds. The veto of events
containting a third electron or muon suppresses the WZ background, and also serves to make this analyis exclusive with respect to searches in
the trilepton final state.

The dilepton mass distributions in the preselection region of the targeted search (without the dilepton mass requirement applied) 
for the ee and $\mu\mu$ final states are shown in Figure~\ref{fig:dilmass_2j_targeted}. In Table~\ref{table:zyields_2j_targeted} 
the data and MC yields in the preselection region are indicated. Good data vs. MC agreement is observed.

\begin{figure}[hbt]
  \begin{center}
        \includegraphics[width=1.0\linewidth]{plots/dilmass_ee_mm_2j_targeted.pdf}
        \caption{
          \label{fig:dilmass_2j_targeted}\protect 
          Dilepton mass distribution for events in the preselection region of the targeted search
          in the ee (left) and $\mu\mu$ (right) final states.}
  \end{center}
\end{figure}

\begin{table}[htb]
\begin{center}
\caption{\label{table:zyields_2j_targeted} Data and MC yields in the preselection region of the inclusive search.
}
\begin{tabular}{lccccc}
\hline
\hline
         Sample   &           ee   &       $\mu\mu$   &         e$\mu$   &            total  \\
\hline
         \zjets   &14108.9 $\pm$ 486.3   &21927.1 $\pm$ 606.4   &  0.0 $\pm$ 0.0   &36036.0 $\pm$ 777.4  \\
         \ttbar   & 21.0 $\pm$ 2.9   & 33.4 $\pm$ 3.9   & 53.7 $\pm$ 5.0   &108.0 $\pm$ 6.9  \\
             WZ   &135.6 $\pm$ 1.4   &188.5 $\pm$ 1.6   &  1.0 $\pm$ 0.1   &325.1 $\pm$ 2.1  \\
             ZZ   &106.0 $\pm$ 1.0   &148.8 $\pm$ 1.2   &  0.1 $\pm$ 0.0   &254.9 $\pm$ 1.5  \\
             WW   &  3.4 $\pm$ 0.4   &  4.1 $\pm$ 0.4   &  7.8 $\pm$ 0.5   & 15.2 $\pm$ 0.7  \\
     single top   &  2.0 $\pm$ 0.8   &  2.8 $\pm$ 1.1   &  5.5 $\pm$ 1.4   & 10.3 $\pm$ 1.9  \\
\hline
    total SM MC   &14376.9 $\pm$ 486.3   &22304.7 $\pm$ 606.5   & 68.0 $\pm$ 5.2   &36749.6 $\pm$ 777.4  \\
\hline
           data   &          14647   &          21840   &             74   &          36561  \\
\hline
\hline
\hline
\end{tabular}
\end{center}
\end{table}


\clearpage


\begin{comment}

The data yields and the MC predictions are given in Table~\ref{preselyieldtable}.
%Dilepton mass and MET distributions for \emu ~events are shown in appendix \ref{app:emu}.

As anticipated, the MC predicts that the preselection is dominated by Z+jets in the same-flavor 
case and by \ttbar\ in the opposite-flavor case.  
%The data yield is in reasonable agreement with the predictions for the $ee$, $\mu\mu$ and $e\mu$ channels.

\begin{comment}

We also show the %LO 
next-to-leading order (NLO) 
yields for the LM4 and LM8 processes, which are benchmark
SUSY processes in which $Z$ bosons are produced via cascade decays of SUSY particles. 


\begin{table}[htb]
\begin{center}
\caption{\label{preselyieldtable} Data and Monte Carlo yields for the preselection with \njets\ $\ge$ 2 for \lumi. 
  %The NLO yields for the SUSY benchmark processes LM4 and LM8 are also shown.
}
\begin{tabular}{lccccc}
\hline
              Sample   &                $ee$   &            $\mu\mu$   &              $e\mu$   &         tot  \\
\hline

        WJets &   10.8 $\pm$    4.4  &     0.0 $\pm$    0.0  &     8.5 $\pm$    3.8  &    19.3 $\pm$    5.8 \\ 
           WW &   14.8 $\pm$    0.5  &    17.2 $\pm$    0.5  &    32.9 $\pm$    0.8  &    64.9 $\pm$    1.1 \\ 
           WZ &  405.7 $\pm$    1.8  &   411.7 $\pm$    1.7  &     5.0 $\pm$    0.1  &   822.4 $\pm$    2.5 \\ 
           ZZ &  313.3 $\pm$    1.2  &   349.1 $\pm$    1.2  &     0.8 $\pm$    0.0  &   663.2 $\pm$    1.6 \\ 
   Single Top &   29.3 $\pm$    1.2  &    26.1 $\pm$    1.0  &    50.8 $\pm$    1.5  &   106.2 $\pm$    2.1 \\ 
     \ttbar &  523.2 $\pm$    2.6  &   529.0 $\pm$    2.5  &  1056.7 $\pm$    3.6  &  2108.8 $\pm$    5.1 \\ 
       Z+Jets & 51051.4 $\pm$  147.5  &  53149.1 $\pm$  143.0  &    16.2 $\pm$    2.6  &  104216.8 $\pm$  205.4 \\ 
\hline
     Total MC & 52348.5 $\pm$  147.6  &  54482.2 $\pm$  143.0  &  1171.0 $\pm$    6.1  &  108001.6 $\pm$  205.6 \\ 
\hline
         Data &  49214  &   52757  &    1256  &  103227 \\ 
\hline


\end{tabular}
\end{center}
\end{table}

\end{comment}
Revision:	1.2
Committed:	Wed Jun 27 15:56:31 2012 UTC (12 years, 10 months ago) by benhoob
Content type:	application/x-tex
Branch:	MAIN
Changes since 1.1:	+68 -11 lines
Log Message:	lots of updates
#	User	Rev	Content
1	benhoob	1.1	\clearpage
2
3			\section{Data vs. MC Comparison in Preselection Region}
4			\label{sec:yields}
5
6			In this section we compare the data and MC samples passing the selection described in Sec.~\ref{sec:eventSelection}
7	benhoob	1.2	In the following, the MC is reweighted to match the data distribution of number of reconstructed primary vertices
8			{\bf FIXME: UPDATE TO 5.1/fb VTX-REWEIGHTING, CURRENTLY USING OUTDATED FUNCTION}.
9	benhoob	1.1	The trigger efficiencies of Sec.~\ref{sec:datasets} are applied. In all plots, the last bin contains the overflow.
10
11			We begin by counting the inclusive Z yields. Here we require the presence of two selected leptons without
12			any additional requirements on jets or \MET. In Fig.~\ref{fig:dilmass} the distribution of dilepton invariant
13			mass in the ee and $\mu\mu$ channels is displayed. In Table~\ref{table:zyields} the yields for selected dilepton
14			events in the Z mass window are indicated. Good data vs. MC agreement is observed, within the systematic uncertainties
15			of integrated luminosity (4.5\%), trigger efficiency (3\%), \zjets\ and \ttbar\ cross sections.
16
17			\begin{figure}[hbt]
18			\begin{center}
19			\includegraphics[width=1.0\linewidth]{plots/dilmass_ee_mm.pdf}
20			\caption{
21			\label{fig:dilmass}\protect
22			Dilepton mass distribution for events with two selected leptons
23	benhoob	1.2	in the ee (left) and $\mu\mu$ (right) final states.}
24	benhoob	1.1	\end{center}
25			\end{figure}
26
27
28			\begin{table}[htb]
29			\begin{center}
30			\caption{\label{table:zyields} Data and Monte Carlo yields for events with two selected leptons in the Z mass window.
31			}
32			\begin{tabular}{lccccc}
33			\hline
34			\hline
35			Sample & ee & $\mu\mu$ & e$\mu$ & total \\
36			\hline
37			\zjets & 1150211.5 $\pm$ 4886.0 & 1697568.1 $\pm$ 5680.2 & 281.5 $\pm$ 63.7 & 2848061.2 $\pm$ 7492.8 \\
38			\ttbar & 829.1 $\pm$ 20.0 & 1120.7 $\pm$ 22.6 & 1910.9 $\pm$ 29.7 & 3860.7 $\pm$ 42.4 \\
39			WZ & 1038.2 $\pm$ 3.6 & 1465.5 $\pm$ 4.1 & 29.5 $\pm$ 0.5 & 2533.2 $\pm$ 5.5 \\
40			ZZ & 658.0 $\pm$ 2.4 & 933.0 $\pm$ 2.7 & 2.7 $\pm$ 0.1 & 1593.7 $\pm$ 3.6 \\
41			WW & 146.7 $\pm$ 2.6 & 209.0 $\pm$ 2.9 & 358.9 $\pm$ 3.9 & 714.6 $\pm$ 5.5 \\
42			single top & 70.9 $\pm$ 4.9 & 103.3 $\pm$ 5.7 & 172.5 $\pm$ 7.4 & 346.7 $\pm$ 10.5 \\
43			\hline
44			total SM MC & 1152954.5 $\pm$ 4886.1 & 1701399.6 $\pm$ 5680.3 &2756.1 $\pm$ 70.8 & 2857110.2 $\pm$ 7493.0 \\
45			\hline
46			data & 1162229 & 1774353 & 3077 & 2939659 \\
47
48
49			\hline
50			\hline
51			\end{tabular}
52			\end{center}
53			\end{table}
54
55			\clearpage
56
57	benhoob	1.2	We next define the preselection region for the inclusive search using the following requirements:
58	benhoob	1.1	\begin{itemize}
59	benhoob	1.2	\item Number of jets $\geq$ 2;
60			\item Same flavor dileptons (opposite flavor yields will be shown since they are used in data for the FS background estimation);
61			\item Dilepton invariant mass $81<m_{\ell\ell}<101$ GeV.
62	benhoob	1.1	\end{itemize}
63
64	benhoob	1.2	The dilepton mass distributions in the preselection region of the inclusive search (without the dilepton mass requirement applied)
65			for the ee and $\mu\mu$ final states are shown in Figure~\ref{fig:dilmass_2j}. In Table~\ref{table:zyields_2j} the data and MC yields in the preselection
66	benhoob	1.1	region are indicated. Good data vs. MC agreement is observed.
67
68
69			\begin{figure}[hbt]
70			\begin{center}
71			\includegraphics[width=1.0\linewidth]{plots/dilmass_ee_mm_2j.pdf}
72			\caption{
73			\label{fig:dilmass_2j}\protect
74	benhoob	1.2	Dilepton mass distribution for events in the preselection region of the inclusive search
75			in the ee (left) and $\mu\mu$ (right) final states.}
76	benhoob	1.1	\end{center}
77			\end{figure}
78
79			\begin{table}[htb]
80			\begin{center}
81	benhoob	1.2	\caption{\label{table:zyields_2j} Data and MC yields in the preselection region of the inclusive search.
82	benhoob	1.1	}
83			\begin{tabular}{lccccc}
84			\hline
85			\hline
86			Sample & ee & $\mu\mu$ & e$\mu$ & total \\
87			\hline
88			\zjets & 53187.8 $\pm$ 988.5 &78070.5 $\pm$ 1165.7 & 5.6 $\pm$ 3.6 &131264.0 $\pm$ 1528.4 \\
89			\ttbar & 645.3 $\pm$ 17.7 &865.1 $\pm$ 19.7 &1470.4 $\pm$ 25.8 &2980.8 $\pm$ 37.0 \\
90			WZ & 431.2 $\pm$ 2.4 &594.6 $\pm$ 2.7 & 5.8 $\pm$ 0.2 &1031.6 $\pm$ 3.6 \\
91			ZZ & 269.9 $\pm$ 1.6 &377.7 $\pm$ 1.8 & 0.5 $\pm$ 0.0 &648.1 $\pm$ 2.4 \\
92			WW & 15.2 $\pm$ 0.8 & 22.2 $\pm$ 0.9 & 38.9 $\pm$ 1.3 & 76.4 $\pm$ 1.7 \\
93			single top & 28.8 $\pm$ 3.2 & 38.0 $\pm$ 3.4 & 72.0 $\pm$ 4.9 &138.8 $\pm$ 6.7 \\
94			\hline
95			total SM MC & 54578.1 $\pm$ 988.7 &79968.3 $\pm$ 1165.9 &1593.3 $\pm$ 26.5 &136139.7 $\pm$ 1528.9 \\
96			\hline
97			data & 54426 & 80367 & 1565 & 136358 \\
98
99			\hline
100			\hline
101			\end{tabular}
102			\end{center}
103			\end{table}
104
105
106			\clearpage
107
108	benhoob	1.2	We next define the preselection region for the targeted search by adding the following requirements:
109			\begin{itemize}
110			\item Veto events containing a b-tagged jet;
111			\item Dijet invariant mass $70<m_{jj}<110$ GeV;
112			\item Veto events containing a third selected lepton (electron or muon) with \pt $>$ 20 GeV {\bf FIXME: lower third lepton \pt threshold to 10 GeV}.
113			\end{itemize}
114
115			The rejection of events with a b-tagged jet strongly suppresses the \ttbar\ background, which is the dominant background in the inclusive search
116			after requiring large \MET. The requirement that the jet pair is consistent with originating from W/Z decay is motivated by the fact that we are
117			searching for signatures producing V(jj)Z($\ell\ell$)+\MET; this requirement suppresses the \zjets\ and \ttbar\ backgrounds. The veto of events
118			containting a third electron or muon suppresses the WZ background, and also serves to make this analyis exclusive with respect to searches in
119			the trilepton final state.
120
121			The dilepton mass distributions in the preselection region of the targeted search (without the dilepton mass requirement applied)
122			for the ee and $\mu\mu$ final states are shown in Figure~\ref{fig:dilmass_2j_targeted}. In Table~\ref{table:zyields_2j_targeted}
123			the data and MC yields in the preselection region are indicated. Good data vs. MC agreement is observed.
124
125			\begin{figure}[hbt]
126			\begin{center}
127			\includegraphics[width=1.0\linewidth]{plots/dilmass_ee_mm_2j_targeted.pdf}
128			\caption{
129			\label{fig:dilmass_2j_targeted}\protect
130			Dilepton mass distribution for events in the preselection region of the targeted search
131			in the ee (left) and $\mu\mu$ (right) final states.}
132			\end{center}
133			\end{figure}
134
135			\begin{table}[htb]
136			\begin{center}
137			\caption{\label{table:zyields_2j_targeted} Data and MC yields in the preselection region of the inclusive search.
138			}
139			\begin{tabular}{lccccc}
140			\hline
141			\hline
142			Sample & ee & $\mu\mu$ & e$\mu$ & total \\
143			\hline
144			\zjets &14108.9 $\pm$ 486.3 &21927.1 $\pm$ 606.4 & 0.0 $\pm$ 0.0 &36036.0 $\pm$ 777.4 \\
145			\ttbar & 21.0 $\pm$ 2.9 & 33.4 $\pm$ 3.9 & 53.7 $\pm$ 5.0 &108.0 $\pm$ 6.9 \\
146			WZ &135.6 $\pm$ 1.4 &188.5 $\pm$ 1.6 & 1.0 $\pm$ 0.1 &325.1 $\pm$ 2.1 \\
147			ZZ &106.0 $\pm$ 1.0 &148.8 $\pm$ 1.2 & 0.1 $\pm$ 0.0 &254.9 $\pm$ 1.5 \\
148			WW & 3.4 $\pm$ 0.4 & 4.1 $\pm$ 0.4 & 7.8 $\pm$ 0.5 & 15.2 $\pm$ 0.7 \\
149			single top & 2.0 $\pm$ 0.8 & 2.8 $\pm$ 1.1 & 5.5 $\pm$ 1.4 & 10.3 $\pm$ 1.9 \\
150			\hline
151			total SM MC &14376.9 $\pm$ 486.3 &22304.7 $\pm$ 606.5 & 68.0 $\pm$ 5.2 &36749.6 $\pm$ 777.4 \\
152			\hline
153			data & 14647 & 21840 & 74 & 36561 \\
154			\hline
155			\hline
156			\hline
157			\end{tabular}
158			\end{center}
159			\end{table}
160
161
162			\clearpage
163
164	benhoob	1.1
165
166
167
168
169
170
171
172
173			\begin{comment}
174
175			The data yields and the MC predictions are given in Table~\ref{preselyieldtable}.
176			%Dilepton mass and MET distributions for \emu ~events are shown in appendix \ref{app:emu}.
177
178			As anticipated, the MC predicts that the preselection is dominated by Z+jets in the same-flavor
179			case and by \ttbar\ in the opposite-flavor case.
180			%The data yield is in reasonable agreement with the predictions for the $ee$, $\mu\mu$ and $e\mu$ channels.
181
182			\begin{comment}
183
184			We also show the %LO
185			next-to-leading order (NLO)
186			yields for the LM4 and LM8 processes, which are benchmark
187			SUSY processes in which $Z$ bosons are produced via cascade decays of SUSY particles.
188
189
190			\begin{table}[htb]
191			\begin{center}
192			\caption{\label{preselyieldtable} Data and Monte Carlo yields for the preselection with \njets\ $\ge$ 2 for \lumi.
193			%The NLO yields for the SUSY benchmark processes LM4 and LM8 are also shown.
194			}
195			\begin{tabular}{lccccc}
196			\hline
197			Sample & $ee$ & $\mu\mu$ & $e\mu$ & tot \\
198			\hline
199
200			WJets & 10.8 $\pm$ 4.4 & 0.0 $\pm$ 0.0 & 8.5 $\pm$ 3.8 & 19.3 $\pm$ 5.8 \\
201			WW & 14.8 $\pm$ 0.5 & 17.2 $\pm$ 0.5 & 32.9 $\pm$ 0.8 & 64.9 $\pm$ 1.1 \\
202			WZ & 405.7 $\pm$ 1.8 & 411.7 $\pm$ 1.7 & 5.0 $\pm$ 0.1 & 822.4 $\pm$ 2.5 \\
203			ZZ & 313.3 $\pm$ 1.2 & 349.1 $\pm$ 1.2 & 0.8 $\pm$ 0.0 & 663.2 $\pm$ 1.6 \\
204			Single Top & 29.3 $\pm$ 1.2 & 26.1 $\pm$ 1.0 & 50.8 $\pm$ 1.5 & 106.2 $\pm$ 2.1 \\
205			\ttbar & 523.2 $\pm$ 2.6 & 529.0 $\pm$ 2.5 & 1056.7 $\pm$ 3.6 & 2108.8 $\pm$ 5.1 \\
206			Z+Jets & 51051.4 $\pm$ 147.5 & 53149.1 $\pm$ 143.0 & 16.2 $\pm$ 2.6 & 104216.8 $\pm$ 205.4 \\
207			\hline
208			Total MC & 52348.5 $\pm$ 147.6 & 54482.2 $\pm$ 143.0 & 1171.0 $\pm$ 6.1 & 108001.6 $\pm$ 205.6 \\
209			\hline
210			Data & 49214 & 52757 & 1256 & 103227 \\
211			\hline
212
213
214			\end{tabular}
215			\end{center}
216			\end{table}
217
218			\end{comment}