Notes/WZCSA07/noteWZ.tex

\documentclass{cmspaper}

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% $Id:
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\usepackage{graphicx}
\usepackage[intlimits]{amsmath}
\usepackage{amsfonts}
\usepackage{amssymb}
\usepackage{fancyhdr}
\usepackage{epsfig}
\usepackage{rotating}
\usepackage{lscape}
\usepackage{graphicx}
\usepackage{pst-node}
\usepackage{epstopdf}
\usepackage{subfigure}
\usepackage{amsmath}

\renewcommand{\dj}{d\kern-0.4em\char"16\kern-0.1em}
\renewcommand{\DJ}{\raise0.3ex\hbox{-}\kern-0.36em D}


\RequirePackage{xspace}
\input noteWZsymbols

\begin{document}

%==============================================================================
% title page for few authors

\begin{titlepage}

  \analysisnote{2008/051}
   \date{\today}

  \title{Study of the process\\
    $ \proton\proton\to \W\Z \to  \ell^{\pm}\nu \ellell (\ell=e,\mu)$\\
     at CMS}

  \begin{Authlist}
    V.~Brigljevi\'c, S.~Morovi\'c, S.~ \DJ uri\'c
       \Instfoot{IRB}{Ru\dj er Bo\v skovi\'c Institute, 10002 Zagreb, Croatia}
       S.~Beauceron
       \Instfoot{CERN}{CERN, Geneva, Switzerland}
       K.~Kaadze, Y.~Maravin
       \Instfoot{KSU}{Kansas State University, Manhattan, Kansas, USA}
  \end{Authlist}

  \begin{abstract}

    In this note, we investigate the discovery potential
    for the $\proton\proton \to \W\Z \to \ell^{\pm}\nu\ellell (\ell=e,\mu)$ process at CMS,
    using full detector simulation of the signal and of the various physics and
    instrumental backgrounds. We propose data driven methods to extract backgrounds
    and estimate that we can reach 5$\sigma$ significance of \WZ signal at CMS with
    less than 350 \invpb at 95 \% CL.
    
%    We determine the signal significance as a function of
%    integrated luminosity at the LHC based on Standard Model
%    cross sections computed at the next to leading order in $\alpha_s$.  
%    We expect $\sim 97 $ signal $\W\Z \to \ell^{\pm}\nu \ellell (\ell=e,\mu)$ events 
%    and $\sim 22$ background events per inverse femtobarn. The background is found
%    to be dominated by the $\Zbbbar$,  $\t\tbar$, and \ZZ processes.
%    The sensitivity of the method allows for a potential 5-sigma discovery
%    of the $\proton\proton \to\W\Z$ process with about 150 inverse picobarn.
  \end{abstract}

\end{titlepage}

\setcounter{page}{2}%JPP

%==============================================================================

\tableofcontents

\setcounter{footnote}{0}

\newpage
\input introduction
\input samples
\input selection
%\newpage
\input zjetbackground
\input Sys
\input results
\input conclusion
\clearpage

\bibliographystyle{physrev4wt}
\bibliography{noteWZ}


\begin{thebibliography}{99}
\bibitem{Haywood:1999qg} S.Haywood {\it et al.} ``Electroweak physics'', hep-ph/0003275
\bibitem{Sjostrand:2003wg} T. Sjostrand, L. Lonnblad, S. Mrenna and P. Skands, ``PYHTIA 6.3: Physics and manual'', hep-ph/0308153
\bibitem{Campbell:2005} J. M. Campbell and R. K. Ellis, ``MCFM v4.1. A Monte Carlo for FeMtobarn processes at hadron colliders''
\bibitem{Frixione:2002ik} S. Frixione and B. R. Webber, ``Matching NLO QCD computations and parton shower simulations'', JHEP 06.029 (2002), [hep-ph/0204244]
\bibitem{noteElectronID} S.~Beauceron, K.~Kaadze, Y.~Maravin, V.~Brigljevic, S.~Morovic, ``Study of electron identification in $\W^{\pm} Z\to \ell^+\ell^- \ell^\pm \nu$ events'', CMS~AN-2008/047
\bibitem{Zmumu} N.~Adam {\it and al}, ``Towards a measurement of the inclusive $W\rightarrow\mu\nu$ and $Z\rightarrow\mu^{+}\mu^{-}$ cross sections in pp collisions at $\sqrt{s} = 14$ TeV'', CMS~AN-2007/031
\bibitem{Zee}N.~Adam {\it and al}, ``Towards a Measurement of the Inclusive $W\rightarrow e\nu$ and $Z\rightarrow ee$ Cross Section in pp Collisions at sqrt(s) = 14 TeV'', CMS~AN-2007/026
\bibitem{TP}G.~Daskalakis, D.~Evans, C.S.~Hill, J.~Jackson, P.~Vanlaer, J.~Berryhill, J.~Haupt, D.~Futyan, C.~Seez, C.~Timlin, D.~Wardrope, ``Measuring Electron Efficiencies at CMS with Early Data'', CMS~AN-2007/019
\bibitem{OldNote}V.~Brigljevic, D.~Ferencek, S.~Morovic, M.~Planinic, A.~Oh ``Study of the process $pp\rightarrow WZ \rightarrow 3l$ at CMS'', CMS~AN-2006/063
\bibitem{BLUE} L. Lyons, D. Gibaut, P.Clifford ``How to Combine Correlated Estimates of a Single Physical Quantity'', Nucl.Instrum.Meth.A270:110,1988. 


%\bibitem{PTDR1} CMS Collaboration, Physics Technical Design Report, Vol.1 - Detector Performance and Software, CERN/LHCC 2006-001 (February 2006).
\end{thebibliography}


\newpage
\appendix
\input wzmatcheff
\clearpage
\input BackgroundEstimationDetails
\clearpage
\input AppendixBkgEst
\input AppendixPseudoExp
\input xsection
\input AppendixABCD

\end{document}
Revision:	1.24
Committed:	Mon Sep 8 19:17:27 2008 UTC (16 years, 8 months ago) by smorovic
Content type:	application/x-tex
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.23:	+1 -1 lines
Log Message:	add AppendixABCD
#	User	Rev	Content
1	vuko	1.1	\documentclass{cmspaper}
2
3			%
4			% $Id:
5			%
6
7			\usepackage{graphicx}
8			\usepackage[intlimits]{amsmath}
9			\usepackage{amsfonts}
10			\usepackage{amssymb}
11			\usepackage{fancyhdr}
12			\usepackage{epsfig}
13			\usepackage{rotating}
14			\usepackage{lscape}
15			\usepackage{graphicx}
16			\usepackage{pst-node}
17	ymaravin	1.5	\usepackage{epstopdf}
18	ymaravin	1.19	\usepackage{subfigure}
19	kkaadze	1.23	\usepackage{amsmath}
20	senka	1.7
21			\renewcommand{\dj}{d\kern-0.4em\char"16\kern-0.1em}
22			\renewcommand{\DJ}{\raise0.3ex\hbox{-}\kern-0.36em D}
23
24	ymaravin	1.5
25	vuko	1.1	\RequirePackage{xspace}
26	vuko	1.2	\input noteWZsymbols
27	vuko	1.1
28			\begin{document}
29
30			%==============================================================================
31			% title page for few authors
32
33			\begin{titlepage}
34
35	vuko	1.11	\analysisnote{2008/051}
36	beaucero	1.12	\date{\today}
37	vuko	1.1
38			\title{Study of the process\\
39	ymaravin	1.5	$ \proton\proton\to \W\Z \to \ell^{\pm}\nu \ellell (\ell=e,\mu)$\\
40	vuko	1.1	at CMS}
41
42			\begin{Authlist}
43	senka	1.7	V.~Brigljevi\'c, S.~Morovi\'c, S.~ \DJ uri\'c
44			\Instfoot{IRB}{Ru\dj er Bo\v skovi\'c Institute, 10002 Zagreb, Croatia}
45	vuko	1.1	S.~Beauceron
46			\Instfoot{CERN}{CERN, Geneva, Switzerland}
47			K.~Kaadze, Y.~Maravin
48			\Instfoot{KSU}{Kansas State University, Manhattan, Kansas, USA}
49			\end{Authlist}
50
51			\begin{abstract}
52
53			In this note, we investigate the discovery potential
54	ymaravin	1.5	for the $\proton\proton \to \W\Z \to \ell^{\pm}\nu\ellell (\ell=e,\mu)$ process at CMS,
55			using full detector simulation of the signal and of the various physics and
56	ymaravin	1.13	instrumental backgrounds. We propose data driven methods to extract backgrounds
57			and estimate that we can reach 5$\sigma$ significance of \WZ signal at CMS with
58	ymaravin	1.22	less than 350 \invpb at 95 \% CL.
59	ymaravin	1.5
60	beaucero	1.3	% We determine the signal significance as a function of
61			% integrated luminosity at the LHC based on Standard Model
62			% cross sections computed at the next to leading order in $\alpha_s$.
63	ymaravin	1.5	% We expect $\sim 97 $ signal $\W\Z \to \ell^{\pm}\nu \ellell (\ell=e,\mu)$ events
64			% and $\sim 22$ background events per inverse femtobarn. The background is found
65			% to be dominated by the $\Zbbbar$, $\t\tbar$, and \ZZ processes.
66			% The sensitivity of the method allows for a potential 5-sigma discovery
67			% of the $\proton\proton \to\W\Z$ process with about 150 inverse picobarn.
68	vuko	1.1	\end{abstract}
69
70			\end{titlepage}
71
72			\setcounter{page}{2}%JPP
73
74			%==============================================================================
75
76			\tableofcontents
77
78			\setcounter{footnote}{0}
79
80			\newpage
81			\input introduction
82			\input samples
83			\input selection
84	beaucero	1.17	%\newpage
85	ymaravin	1.10	\input zjetbackground
86			\input Sys
87	vuko	1.1	\input results
88			\input conclusion
89	ymaravin	1.20	\clearpage
90	vuko	1.1
91			\bibliographystyle{physrev4wt}
92			\bibliography{noteWZ}
93
94	beaucero	1.12
95			\begin{thebibliography}{99}
96			\bibitem{Haywood:1999qg} S.Haywood {\it et al.} ``Electroweak physics'', hep-ph/0003275
97			\bibitem{Sjostrand:2003wg} T. Sjostrand, L. Lonnblad, S. Mrenna and P. Skands, ``PYHTIA 6.3: Physics and manual'', hep-ph/0308153
98			\bibitem{Campbell:2005} J. M. Campbell and R. K. Ellis, ``MCFM v4.1. A Monte Carlo for FeMtobarn processes at hadron colliders''
99			\bibitem{Frixione:2002ik} S. Frixione and B. R. Webber, ``Matching NLO QCD computations and parton shower simulations'', JHEP 06.029 (2002), [hep-ph/0204244]
100			\bibitem{noteElectronID} S.~Beauceron, K.~Kaadze, Y.~Maravin, V.~Brigljevic, S.~Morovic, ``Study of electron identification in $\W^{\pm} Z\to \ell^+\ell^- \ell^\pm \nu$ events'', CMS~AN-2008/047
101			\bibitem{Zmumu} N.~Adam {\it and al}, ``Towards a measurement of the inclusive $W\rightarrow\mu\nu$ and $Z\rightarrow\mu^{+}\mu^{-}$ cross sections in pp collisions at $\sqrt{s} = 14$ TeV'', CMS~AN-2007/031
102			\bibitem{Zee}N.~Adam {\it and al}, ``Towards a Measurement of the Inclusive $W\rightarrow e\nu$ and $Z\rightarrow ee$ Cross Section in pp Collisions at sqrt(s) = 14 TeV'', CMS~AN-2007/026
103			\bibitem{TP}G.~Daskalakis, D.~Evans, C.S.~Hill, J.~Jackson, P.~Vanlaer, J.~Berryhill, J.~Haupt, D.~Futyan, C.~Seez, C.~Timlin, D.~Wardrope, ``Measuring Electron Efficiencies at CMS with Early Data'', CMS~AN-2007/019
104			\bibitem{OldNote}V.~Brigljevic, D.~Ferencek, S.~Morovic, M.~Planinic, A.~Oh ``Study of the process $pp\rightarrow WZ \rightarrow 3l$ at CMS'', CMS~AN-2006/063
105	kkaadze	1.23	\bibitem{BLUE} L. Lyons, D. Gibaut, P.Clifford ``How to Combine Correlated Estimates of a Single Physical Quantity'', Nucl.Instrum.Meth.A270:110,1988.
106	beaucero	1.12
107
108			%\bibitem{PTDR1} CMS Collaboration, Physics Technical Design Report, Vol.1 - Detector Performance and Software, CERN/LHCC 2006-001 (February 2006).
109			\end{thebibliography}
110
111	ymaravin	1.19
112	beaucero	1.17	\newpage
113	ymaravin	1.19	\appendix
114	beaucero	1.17	\input wzmatcheff
115	ymaravin	1.20	\clearpage
116			\input BackgroundEstimationDetails
117			\clearpage
118	beaucero	1.17	\input AppendixBkgEst
119	beaucero	1.21	\input AppendixPseudoExp
120	kkaadze	1.23	\input xsection
121	smorovic	1.24	\input AppendixABCD
122	beaucero	1.17
123	vuko	1.1	\end{document}