Notes/WZCSA07/noteWZ.tex

\documentclass{cmspaper}

%
% $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}

\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{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


\end{document}
Revision:	1.22
Committed:	Fri Aug 8 00:05:00 2008 UTC (16 years, 8 months ago) by ymaravin
Content type:	application/x-tex
Branch:	MAIN
CVS Tags:	Summer08-FinalApproved
Changes since 1.21:	+1 -4 lines
Log Message:	almost final version, the fruit of a hard work of Stephanie and YM...
#	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	senka	1.7
20			\renewcommand{\dj}{d\kern-0.4em\char"16\kern-0.1em}
21			\renewcommand{\DJ}{\raise0.3ex\hbox{-}\kern-0.36em D}
22
23	ymaravin	1.5
24	vuko	1.1	\RequirePackage{xspace}
25	vuko	1.2	\input noteWZsymbols
26	vuko	1.1
27			\begin{document}
28
29			%==============================================================================
30			% title page for few authors
31
32			\begin{titlepage}
33
34	vuko	1.11	\analysisnote{2008/051}
35	beaucero	1.12	\date{\today}
36	vuko	1.1
37			\title{Study of the process\\
38	ymaravin	1.5	$ \proton\proton\to \W\Z \to \ell^{\pm}\nu \ellell (\ell=e,\mu)$\\
39	vuko	1.1	at CMS}
40
41			\begin{Authlist}
42	senka	1.7	V.~Brigljevi\'c, S.~Morovi\'c, S.~ \DJ uri\'c
43			\Instfoot{IRB}{Ru\dj er Bo\v skovi\'c Institute, 10002 Zagreb, Croatia}
44	vuko	1.1	S.~Beauceron
45			\Instfoot{CERN}{CERN, Geneva, Switzerland}
46			K.~Kaadze, Y.~Maravin
47			\Instfoot{KSU}{Kansas State University, Manhattan, Kansas, USA}
48			\end{Authlist}
49
50			\begin{abstract}
51
52			In this note, we investigate the discovery potential
53	ymaravin	1.5	for the $\proton\proton \to \W\Z \to \ell^{\pm}\nu\ellell (\ell=e,\mu)$ process at CMS,
54			using full detector simulation of the signal and of the various physics and
55	ymaravin	1.13	instrumental backgrounds. We propose data driven methods to extract backgrounds
56			and estimate that we can reach 5$\sigma$ significance of \WZ signal at CMS with
57	ymaravin	1.22	less than 350 \invpb at 95 \% CL.
58	ymaravin	1.5
59	beaucero	1.3	% We determine the signal significance as a function of
60			% integrated luminosity at the LHC based on Standard Model
61			% cross sections computed at the next to leading order in $\alpha_s$.
62	ymaravin	1.5	% We expect $\sim 97 $ signal $\W\Z \to \ell^{\pm}\nu \ellell (\ell=e,\mu)$ events
63			% and $\sim 22$ background events per inverse femtobarn. The background is found
64			% to be dominated by the $\Zbbbar$, $\t\tbar$, and \ZZ processes.
65			% The sensitivity of the method allows for a potential 5-sigma discovery
66			% of the $\proton\proton \to\W\Z$ process with about 150 inverse picobarn.
67	vuko	1.1	\end{abstract}
68
69			\end{titlepage}
70
71			\setcounter{page}{2}%JPP
72
73			%==============================================================================
74
75			\tableofcontents
76
77			\setcounter{footnote}{0}
78
79			\newpage
80			\input introduction
81			\input samples
82			\input selection
83	beaucero	1.17	%\newpage
84	ymaravin	1.10	\input zjetbackground
85			\input Sys
86	vuko	1.1	\input results
87			\input conclusion
88	ymaravin	1.20	\clearpage
89	vuko	1.1
90			\bibliographystyle{physrev4wt}
91			\bibliography{noteWZ}
92
93	beaucero	1.12
94			\begin{thebibliography}{99}
95			\bibitem{Haywood:1999qg} S.Haywood {\it et al.} ``Electroweak physics'', hep-ph/0003275
96			\bibitem{Sjostrand:2003wg} T. Sjostrand, L. Lonnblad, S. Mrenna and P. Skands, ``PYHTIA 6.3: Physics and manual'', hep-ph/0308153
97			\bibitem{Campbell:2005} J. M. Campbell and R. K. Ellis, ``MCFM v4.1. A Monte Carlo for FeMtobarn processes at hadron colliders''
98			\bibitem{Frixione:2002ik} S. Frixione and B. R. Webber, ``Matching NLO QCD computations and parton shower simulations'', JHEP 06.029 (2002), [hep-ph/0204244]
99			\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
100			\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
101			\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
102			\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
103			\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
104
105
106			%\bibitem{PTDR1} CMS Collaboration, Physics Technical Design Report, Vol.1 - Detector Performance and Software, CERN/LHCC 2006-001 (February 2006).
107			\end{thebibliography}
108
109	ymaravin	1.19
110	beaucero	1.17	\newpage
111	ymaravin	1.19	\appendix
112	beaucero	1.17	\input wzmatcheff
113	ymaravin	1.20	\clearpage
114			\input BackgroundEstimationDetails
115			\clearpage
116	beaucero	1.17	\input AppendixBkgEst
117	beaucero	1.21	\input AppendixPseudoExp
118	beaucero	1.18
119	beaucero	1.17
120	vuko	1.1	\end{document}