Search for resonances in the dilepton mass distribution in pp collisions at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \sqrt {s} = 7 $\end{document} TeV

被引：0
作者：
S. Chatrchyan
V. Khachatryan
A. M. Sirunyan
A. Tumasyan
W. Adam
T. Bergauer
M. Dragicevic
J. Erö
C. Fabjan
M. Friedl
R. Frühwirth
V. M. Ghete
J. Hammer
S. Hänsel
M. Hoch
N. Hörmann
J. Hrubec
M. Jeitler
G. Kasieczka
W. Kiesenhofer
M. Krammer
D. Liko
I. Mikulec
M. Pernicka
H. Rohringer
R. Schöfbeck
J. Strauss
F. Teischinger
P. Wagner
W. Waltenberger
G. Walzel
E. Widl
C.-E. Wulz
V. Mossolov
N. Shumeiko
J. Suarez Gonzalez
L. Benucci
E. A. De Wolf
X. Janssen
T. Maes
L. Mucibello
S. Ochesanu
B. Roland
R. Rougny
M. Selvaggi
H. Van Haevermaet
P. Van Mechelen
N. Van Remortel
F. Blekman
S. Blyweert
机构：
[1] Yerevan Physics Institute,Instituto de Fisica Teorica
[2] Institut für Hochenergiephysik der OeAW,State Key Lab. of Nucl. Phys. and Tech.
[3] National Centre for Particle and High Energy Physics,Academy of Scientific Research and Technology of the Arab Republic of Egypt
[4] Universiteit Antwerpen,Department of Physics
[5] Vrije Universiteit Brussel,Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg
[6] Université Libre de Bruxelles,Institute of High Energy Physics and Informatization
[7] Ghent University,National Centre for Physics
[8] Université Catholique de Louvain,Institute of Experimental Physics, Faculty of Physics
[9] Université de Mons,State Research Center of Russian Federation
[10] Centro Brasileiro de Pesquisas Fisicas,Instituto de Física de Cantabria (IFCA)
[11] Universidade do Estado do Rio de Janeiro,School of Physics and Astronomy
[12] Universidade Estadual Paulista,undefined
[13] Institute for Nuclear Research and Nuclear Energy,undefined
[14] University of Sofia,undefined
[15] Institute of High Energy Physics,undefined
[16] Peking University,undefined
[17] Universidad de Los Andes,undefined
[18] Technical University of Split,undefined
[19] University of Split,undefined
[20] Institute Rudjer Boskovic,undefined
[21] University of Cyprus,undefined
[22] Charles University,undefined
[23] Egyptian Network of High Energy Physics,undefined
[24] National Institute of Chemical Physics and Biophysics,undefined
[25] University of Helsinki,undefined
[26] Helsinki Institute of Physics,undefined
[27] Lappeenranta University of Technology,undefined
[28] Laboratoire d’Annecy-le-Vieux de Physique des Particules,undefined
[29] IN2P3-CNRS,undefined
[30] DSM/IRFU,undefined
[31] CEA/Saclay,undefined
[32] Laboratoire Leprince-Ringuet,undefined
[33] Ecole Polytechnique,undefined
[34] IN2P3-CNRS,undefined
[35] Université de Haute Alsace Mulhouse,undefined
[36] CNRS/IN2P3,undefined
[37] Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules (IN2P3),undefined
[38] Université de Lyon,undefined
[39] Université Claude Bernard Lyon 1,undefined
[40] CNRS-IN2P3,undefined
[41] Institut de Physique Nucléaire de Lyon,undefined
[42] Tbilisi State University,undefined
[43] RWTH Aachen University,undefined
[44] I. Physikalisches Institut,undefined
[45] RWTH Aachen University,undefined
[46] III. Physikalisches Institut A,undefined
[47] RWTH Aachen University,undefined
[48] III. Physikalisches Institut B,undefined
[49] Deutsches Elektronen-Synchrotron,undefined
[50] University of Hamburg,undefined
来源：
Journal of High Energy Physics | / 2011卷 / 5期
关键词：
Hadron-Hadron Scattering;
D O I：
10.1007/JHEP05(2011)093
中图分类号：
学科分类号：
摘要：
A search for narrow resonances at high mass in the dimuon and dielectron channels has been performed by the CMS experiment at the CERN LHC, using pp collision data recorded at \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ \sqrt {s} = 7 $\end{document} TeV. The event samples correspond to integrated luminosities of 40 pb−1 in the dimuon channel and 35 pb−1 in the dielectron channel. Heavy dilepton resonances are predicted in theoretical models with extra gauge bosons (Z′) or as Kaluza-Klein graviton excitations (GKK) in the Randall-Sundrum model. Upper limits on the inclusive cross section of Z′(GKK) → ℓ+ℓ− relative to Z → ℓ+ℓ− are presented. These limits exclude at 95% confidence level a Z′ with standard-model-like couplings below 1140GeV, the superstring-inspired Zψ′ below 887 GeV, and, for values of the coupling parameter \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$ {{k} \left/ {{{{\overline M }_{\text{Pl}}}}} \right.} $\end{document} of 0.05 (0.1), Kaluza-Klein gravitons below 855 (1079) GeV.
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