cmsnotes/ZMet2011/results.tex


\section{Results}
\label{sec:results}

The data and SM predictions are shown for all events in 
Fig.~\ref{fig:pfmet_eemm}, 
and split between the $ee$
and $\mu\mu$ final states in 
Fig.~\ref{fig:pfmet_ee} and \ref{fig:pfmet_mm}. 
We observe 14 events (7 in each lepton flavor channel) 
%We observe 7  events (all in the $\mu\mu$ channel) %2010
in the loose signal region (MET $>$ \signalmetl~GeV), 
compared to a data-driven prediction of 
13.16  $\pm$  1.15
%$6.0 \pm 0.8$, %2010
which is dominated by the estimated \ttbar contribution. 
For the tight signal region defined by MET $>$ \signalmett~GeV, 
we observe 2 events (both in the $\mu\mu$ channel) compared to a 
data-driven prediction of 
1.18  $\pm$  0.33
%$1.2 \pm 0.4$. %2010
(Recall from table \ref{sigyieldtabletight} that there are two $e\mu$ events in 
the tight signal region.)
The uncertainties quoted above are statistical only, and systematic uncertainties will be 
discussed in Sec.~\ref{sec:systematics}. We conclude that no excess of signal 
with respect to the data-driven prediciton is observed.

%When we have enough data, we will display in the figures the predicted $t\bar{t}$ MET distribution obtained by scaling the $e\mu$ distribution
%in data. However, due to limited statistics we cannot currently do this. Therefore 
For display purposes only, in figures \ref{fig:pfmet_eemm} through \ref{fig:pfmet_mm} we have 
taken the
$t\bar{t}$ MET distribution from MC and normalized it such that the integral for 
MET$>$\signalmetl~GeV matches the data-driven prediction
from the OF subtraction. 
%{\bf I don't know if we want to do this in the final plots.} It's probably fine.

%We observe a slight excess of observed
%MET with respect to the data driven prediction in the bulk of the distribution. Systematic effects which may contribute
%to this excess, including lepton mismeasurement and effects related to pile up, will be assessed in Sec.~\ref{sec:systematics}.


\newcommand{\resultcaption}[1]{
      The observed MET distribution for data in the #1 channels (black points),
      predicted $t\bar{t}$ MET distribution (red line), the sum of predicted 
          $t\bar{t}$ MET distribution and
      Z  MET  distribution  predicted  from photon  MET  templates
      (solid blue line),  and MC stacked for dominant backgrounds. 
          %Here $VV$  indicates the sum
      %of  $WW$,  $WZ$  and  $ZZ$, while  additional  backgrounds  from
      %$W+$jets   and   single  top   are   omitted   since  they   are
      %negligible.  
          Below the  plot is  tabulated the  integral  of the
      predicted  MET distribution  using the  MET templates  method (Z
      pred),  the  predicted ttbar  yield  using  the opposite  flavor
      subtraction  technique (OFOS), the  sum of  these two
      contributions (Z pred + OFOS), and the observed MET distribution
      (data), for MET $>$ 30~GeV and $>$ 60~GeV (which are shown as cross
          checks), and for the signal regions of MET $>$ 100~GeV and $>$ 200~GeV. 
          %TO ADD
          %The quantity pull  = (data-Z prediction)/(Z prediction)  is shown on
      %top of the  plot.  
}

\begin{figure}[hbtp]
  \begin{center}
    \resizebox{1.0\linewidth}{!}{\includegraphics{plots/lep_metPredicted.pdf}}

        \medskip 

    %\resizebox{\linewidth}{!}{
    \begin{tabular}{lcccc}
\hline
\resulttitle
\hline

        Z Pred  &  2060.33  $\pm$  29.07  &   60.47  $\pm$  4.11  &    5.10  $\pm$  0.96  &    0.09  $\pm$  0.04 \\
   \ttbar Pred  &  246.61  $\pm$  6.26  &  152.50  $\pm$  4.92  &   50.63  $\pm$  2.83  &    3.17  $\pm$  0.71 \\
\hline
    Total Pred  &  2306.94  $\pm$  29.74  &  212.98  $\pm$  6.41  &   55.73  $\pm$  2.99  &    3.26  $\pm$  0.71 \\
\hline
          Data  &                 2287  &                  206  &                   57  &                    4 \\

%204/pb
%        Z pred  &  406.20  $\pm$  7.10  &   13.13  $\pm$  1.23  &    1.40  $\pm$  0.62  &    0.05  $\pm$  0.02 \\
%          OFOS  &   54.77  $\pm$  2.95  &   34.73  $\pm$  2.35  &   11.76  $\pm$  1.37  &    1.13  $\pm$  0.46 \\
%\hline
% Z pred + OFOS  &  460.97  $\pm$  7.69  &   47.86  $\pm$  2.66  &   13.16  $\pm$  1.50  &    1.18  $\pm$  0.46 \\
%\hline
%          Data  &                  488  &                   39  &                   14  &                    2 \\

\hline
    \end{tabular}

    \caption{ \resultcaption{$ee$ and $\mu\mu$} }
    \label{fig:pfmet_eemm}
  \end{center}
\end{figure}


\begin{figure}[hbtp]
  \begin{center}
    \resizebox{1.0\linewidth}{!}{\includegraphics{plots/lep_metPredicted_ee.pdf}}

        \medskip 

    %\resizebox{\linewidth}{!}{
    \begin{tabular}{lcccc}
\hline
\resulttitle
\hline

        Z Pred  &  1004.38  $\pm$  13.90  &   30.39  $\pm$  2.04  &    2.52  $\pm$  0.46  &    0.04  $\pm$  0.02 \\
   \ttbar Pred  &  115.11  $\pm$  2.92  &   71.18  $\pm$  2.30  &   23.63  $\pm$  1.32  &    1.48  $\pm$  0.33 \\
\hline
    Total Pred  &  1119.50  $\pm$  14.21  &  101.57  $\pm$  3.07  &   26.15  $\pm$  1.40  &    1.53  $\pm$  0.33 \\
\hline
          Data  &                 1145  &                  114  &                   25  &                    1 \\

%204/pb
%        Z pred  &  195.03  $\pm$  3.39  &    6.58  $\pm$  0.61  &    0.69  $\pm$  0.30  &    0.02  $\pm$  0.01 \\
%          OFOS  &   25.60  $\pm$  1.38  &   16.24  $\pm$  1.10  &    5.50  $\pm$  0.64  &    0.53  $\pm$  0.22 \\
%\hline
% Z pred + OFOS  &  220.64  $\pm$  3.66  &   22.81  $\pm$  1.26  &    6.19  $\pm$  0.71  &    0.55  $\pm$  0.22 \\
%\hline
%          Data  &                  249  &                   22  &                    7  &                    0 \\

\hline
    \end{tabular}

    \caption{ \resultcaption{$ee$} }
    \label{fig:pfmet_ee}
  \end{center}
\end{figure}


\begin{figure}[hbtp]
  \begin{center}
    \resizebox{1.0\linewidth}{!}{\includegraphics{plots/lep_metPredicted_mm.pdf}}

        \medskip 

    %\resizebox{\linewidth}{!}{
    \begin{tabular}{lcccc}
\hline
\resulttitle
\hline

        Z Pred  &  1055.95  $\pm$  15.21  &   30.09  $\pm$  2.08  &    2.58  $\pm$  0.51  &    0.05  $\pm$  0.02 \\
   \ttbar Pred  &  131.50  $\pm$  3.34  &   81.32  $\pm$  2.63  &   27.00  $\pm$  1.51  &    1.69  $\pm$  0.38 \\
\hline
    Total Pred  &  1187.45  $\pm$  15.57  &  111.40  $\pm$  3.35  &   29.58  $\pm$  1.59  &    1.74  $\pm$  0.38 \\
\hline
          Data  &                 1142  &                   92  &                   32  &                    3 \\

%204/pb
%        Z pred  &  211.17  $\pm$  3.74  &    6.55  $\pm$  0.63  &    0.71  $\pm$  0.32  &    0.02  $\pm$  0.01 \\
%          OFOS  &   29.16  $\pm$  1.57  &   18.49  $\pm$  1.25  &    6.26  $\pm$  0.73  &    0.60  $\pm$  0.25 \\
%\hline
% Z pred + OFOS  &  240.33  $\pm$  4.06  &   25.04  $\pm$  1.40  &    6.97  $\pm$  0.79  &    0.63  $\pm$  0.25 \\
%\hline
%          Data  &                  239  &                   17  &                    7  &                    2 \\

\hline
    \end{tabular}

    \caption{ \resultcaption{$\mu\mu$} }
    \label{fig:pfmet_mm}
  \end{center}
\end{figure}


Revision:	1.13
Committed:	Sun Jul 3 18:00:13 2011 UTC (13 years, 10 months ago) by warren
Content type:	application/x-tex
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.12:	+32 -32 lines
Log Message:	Nearly all changes for 976/pb
#	User	Rev	Content
1	benhoob	1.1
2			\section{Results}
3			\label{sec:results}
4
5	warren	1.5	The data and SM predictions are shown for all events in
6			Fig.~\ref{fig:pfmet_eemm},
7			and split between the $ee$
8			and $\mu\mu$ final states in
9			Fig.~\ref{fig:pfmet_ee} and \ref{fig:pfmet_mm}.
10	warren	1.4	We observe 14 events (7 in each lepton flavor channel)
11			%We observe 7 events (all in the $\mu\mu$ channel) %2010
12	warren	1.11	in the loose signal region (MET $>$ \signalmetl~GeV),
13	warren	1.4	compared to a data-driven prediction of
14	warren	1.9	13.16 $\pm$ 1.15
15	warren	1.4	%$6.0 \pm 0.8$, %2010
16			which is dominated by the estimated \ttbar contribution.
17	warren	1.11	For the tight signal region defined by MET $>$ \signalmett~GeV,
18	warren	1.5	we observe 2 events (both in the $\mu\mu$ channel) compared to a
19	warren	1.4	data-driven prediction of
20	warren	1.9	1.18 $\pm$ 0.33
21	warren	1.4	%$1.2 \pm 0.4$. %2010
22	warren	1.9	(Recall from table \ref{sigyieldtabletight} that there are two $e\mu$ events in
23			the tight signal region.)
24			The uncertainties quoted above are statistical only, and systematic uncertainties will be
25	warren	1.4	discussed in Sec.~\ref{sec:systematics}. We conclude that no excess of signal
26			with respect to the data-driven prediciton is observed.
27
28			%When we have enough data, we will display in the figures the predicted $t\bar{t}$ MET distribution obtained by scaling the $e\mu$ distribution
29			%in data. However, due to limited statistics we cannot currently do this. Therefore
30	warren	1.9	For display purposes only, in figures \ref{fig:pfmet_eemm} through \ref{fig:pfmet_mm} we have
31			taken the
32	warren	1.4	$t\bar{t}$ MET distribution from MC and normalized it such that the integral for
33			MET$>$\signalmetl~GeV matches the data-driven prediction
34	benhoob	1.1	from the OF subtraction.
35	warren	1.2	%{\bf I don't know if we want to do this in the final plots.} It's probably fine.
36	benhoob	1.1
37			%We observe a slight excess of observed
38			%MET with respect to the data driven prediction in the bulk of the distribution. Systematic effects which may contribute
39			%to this excess, including lepton mismeasurement and effects related to pile up, will be assessed in Sec.~\ref{sec:systematics}.
40
41
42	warren	1.8
43	warren	1.5	\newcommand{\resultcaption}[1]{
44			The observed MET distribution for data in the #1 channels (black points),
45			predicted $t\bar{t}$ MET distribution (red line), the sum of predicted
46			$t\bar{t}$ MET distribution and
47			Z MET distribution predicted from photon MET templates
48			(solid blue line), and MC stacked for dominant backgrounds.
49			%Here $VV$ indicates the sum
50			%of $WW$, $WZ$ and $ZZ$, while additional backgrounds from
51			%$W+$jets and single top are omitted since they are
52			%negligible.
53			Below the plot is tabulated the integral of the
54			predicted MET distribution using the MET templates method (Z
55			pred), the predicted ttbar yield using the opposite flavor
56			subtraction technique (OFOS), the sum of these two
57			contributions (Z pred + OFOS), and the observed MET distribution
58			(data), for MET $>$ 30~GeV and $>$ 60~GeV (which are shown as cross
59			checks), and for the signal regions of MET $>$ 100~GeV and $>$ 200~GeV.
60			%TO ADD
61			%The quantity pull = (data-Z prediction)/(Z prediction) is shown on
62			%top of the plot.
63			}
64
65	benhoob	1.1	\begin{figure}[hbtp]
66			\begin{center}
67	warren	1.6	\resizebox{1.0\linewidth}{!}{\includegraphics{plots/lep_metPredicted.pdf}}
68	warren	1.3
69			\medskip
70
71	benhoob	1.1	%\resizebox{\linewidth}{!}{
72	warren	1.4	\begin{tabular}{lcccc}
73	benhoob	1.1	\hline
74	warren	1.8	\resulttitle
75	benhoob	1.1	\hline
76	warren	1.10
77	warren	1.13	Z Pred & 2060.33 $\pm$ 29.07 & 60.47 $\pm$ 4.11 & 5.10 $\pm$ 0.96 & 0.09 $\pm$ 0.04 \\
78			\ttbar Pred & 246.61 $\pm$ 6.26 & 152.50 $\pm$ 4.92 & 50.63 $\pm$ 2.83 & 3.17 $\pm$ 0.71 \\
79	benhoob	1.1	\hline
80	warren	1.13	Total Pred & 2306.94 $\pm$ 29.74 & 212.98 $\pm$ 6.41 & 55.73 $\pm$ 2.99 & 3.26 $\pm$ 0.71 \\
81	benhoob	1.1	\hline
82	warren	1.13	Data & 2287 & 206 & 57 & 4 \\
83	warren	1.4
84	warren	1.13	%204/pb
85			% Z pred & 406.20 $\pm$ 7.10 & 13.13 $\pm$ 1.23 & 1.40 $\pm$ 0.62 & 0.05 $\pm$ 0.02 \\
86			% OFOS & 54.77 $\pm$ 2.95 & 34.73 $\pm$ 2.35 & 11.76 $\pm$ 1.37 & 1.13 $\pm$ 0.46 \\
87	warren	1.4	%\hline
88	warren	1.13	% Z pred + OFOS & 460.97 $\pm$ 7.69 & 47.86 $\pm$ 2.66 & 13.16 $\pm$ 1.50 & 1.18 $\pm$ 0.46 \\
89	warren	1.4	%\hline
90	warren	1.13	% Data & 488 & 39 & 14 & 2 \\
91
92	benhoob	1.1	\hline
93			\end{tabular}
94	warren	1.3
95	warren	1.5	\caption{ \resultcaption{$ee$ and $\mu\mu$} }
96	benhoob	1.1	\label{fig:pfmet_eemm}
97			\end{center}
98			\end{figure}
99
100	warren	1.9
101	benhoob	1.1	\begin{figure}[hbtp]
102			\begin{center}
103	warren	1.6	\resizebox{1.0\linewidth}{!}{\includegraphics{plots/lep_metPredicted_ee.pdf}}
104	warren	1.3
105			\medskip
106
107	benhoob	1.1	%\resizebox{\linewidth}{!}{
108	warren	1.4	\begin{tabular}{lcccc}
109	benhoob	1.1	\hline
110	warren	1.8	\resulttitle
111	benhoob	1.1	\hline
112	warren	1.13
113			Z Pred & 1004.38 $\pm$ 13.90 & 30.39 $\pm$ 2.04 & 2.52 $\pm$ 0.46 & 0.04 $\pm$ 0.02 \\
114			\ttbar Pred & 115.11 $\pm$ 2.92 & 71.18 $\pm$ 2.30 & 23.63 $\pm$ 1.32 & 1.48 $\pm$ 0.33 \\
115	benhoob	1.1	\hline
116	warren	1.13	Total Pred & 1119.50 $\pm$ 14.21 & 101.57 $\pm$ 3.07 & 26.15 $\pm$ 1.40 & 1.53 $\pm$ 0.33 \\
117	benhoob	1.1	\hline
118	warren	1.13	Data & 1145 & 114 & 25 & 1 \\
119	warren	1.7
120	warren	1.13	%204/pb
121			% Z pred & 195.03 $\pm$ 3.39 & 6.58 $\pm$ 0.61 & 0.69 $\pm$ 0.30 & 0.02 $\pm$ 0.01 \\
122			% OFOS & 25.60 $\pm$ 1.38 & 16.24 $\pm$ 1.10 & 5.50 $\pm$ 0.64 & 0.53 $\pm$ 0.22 \\
123	warren	1.4	%\hline
124	warren	1.13	% Z pred + OFOS & 220.64 $\pm$ 3.66 & 22.81 $\pm$ 1.26 & 6.19 $\pm$ 0.71 & 0.55 $\pm$ 0.22 \\
125	warren	1.4	%\hline
126	warren	1.13	% Data & 249 & 22 & 7 & 0 \\
127
128	benhoob	1.1	\hline
129			\end{tabular}
130	warren	1.3
131	warren	1.5	\caption{ \resultcaption{$ee$} }
132	benhoob	1.1	\label{fig:pfmet_ee}
133			\end{center}
134			\end{figure}
135
136	warren	1.9
137	benhoob	1.1	\begin{figure}[hbtp]
138			\begin{center}
139	warren	1.6	\resizebox{1.0\linewidth}{!}{\includegraphics{plots/lep_metPredicted_mm.pdf}}
140	warren	1.3
141			\medskip
142
143	benhoob	1.1	%\resizebox{\linewidth}{!}{
144	warren	1.4	\begin{tabular}{lcccc}
145	benhoob	1.1	\hline
146	warren	1.8	\resulttitle
147	benhoob	1.1	\hline
148	warren	1.13
149			Z Pred & 1055.95 $\pm$ 15.21 & 30.09 $\pm$ 2.08 & 2.58 $\pm$ 0.51 & 0.05 $\pm$ 0.02 \\
150			\ttbar Pred & 131.50 $\pm$ 3.34 & 81.32 $\pm$ 2.63 & 27.00 $\pm$ 1.51 & 1.69 $\pm$ 0.38 \\
151	benhoob	1.1	\hline
152	warren	1.13	Total Pred & 1187.45 $\pm$ 15.57 & 111.40 $\pm$ 3.35 & 29.58 $\pm$ 1.59 & 1.74 $\pm$ 0.38 \\
153	benhoob	1.1	\hline
154	warren	1.13	Data & 1142 & 92 & 32 & 3 \\
155	warren	1.4
156	warren	1.13	%204/pb
157			% Z pred & 211.17 $\pm$ 3.74 & 6.55 $\pm$ 0.63 & 0.71 $\pm$ 0.32 & 0.02 $\pm$ 0.01 \\
158			% OFOS & 29.16 $\pm$ 1.57 & 18.49 $\pm$ 1.25 & 6.26 $\pm$ 0.73 & 0.60 $\pm$ 0.25 \\
159	warren	1.4	%\hline
160	warren	1.13	% Z pred + OFOS & 240.33 $\pm$ 4.06 & 25.04 $\pm$ 1.40 & 6.97 $\pm$ 0.79 & 0.63 $\pm$ 0.25 \\
161	warren	1.4	%\hline
162	warren	1.13	% Data & 239 & 17 & 7 & 2 \\
163
164	benhoob	1.1	\hline
165			\end{tabular}
166	warren	1.3
167	warren	1.5	\caption{ \resultcaption{$\mu\mu$} }
168	benhoob	1.1	\label{fig:pfmet_mm}
169			\end{center}
170			\end{figure}
171
172