Search for heavy narrow dilepton resonances in pp collisions at √s=7 TeV and √s=8 TeV

被引:101
作者
Chatrchyan, S. [1 ]
Khachatryan, V. [1 ]
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Aguilo, E. [2 ]
Bergauer, T. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Fabjan, C. [2 ]
Friedl, M. [2 ]
Fruehwirth, R. [2 ,184 ]
Ghete, V. M. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ]
Kiesenhofer, W. [2 ]
Knuenz, V. [2 ]
Krammer, M. [2 ]
Kraetschmer, I. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Pernicka, M. [2 ]
Rabady, D. [2 ]
Rahbaran, B. [2 ]
Rohringer, C. [2 ]
Rohringer, H. [2 ]
Schoefbeck, R. [2 ]
Strauss, J. [2 ]
Taurok, A. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ]
Mossolov, V. [3 ]
Shumeiko, N. [3 ]
Gonzalez, J. Suarez [3 ]
Bansal, M. [4 ]
Bansal, S. [4 ]
Cornelis, T. [4 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Luyckx, S. [4 ]
Mucibello, L. [4 ]
Ochesanu, S. [4 ]
Roland, B. [4 ]
Rougny, R. [4 ]
Selvaggi, M. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
Van Spilbeeck, A. [4 ]
机构
[1] Yerevan Phys Inst, Yerevan 375036, Armenia
[2] OeAW, Inst Hochenergiephys, Vienna, Austria
[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS
[4] Univ Antwerp, Antwerp, Belgium
[5] Vrije Univ Brussel, Brussels, Belgium
[6] Univ Libre Bruxelles, Brussels, Belgium
[7] Univ Ghent, B-9000 Ghent, Belgium
[8] Catholic Univ Louvain, B-1348 Louvain, Belgium
[9] Univ Mons, B-7000 Mons, Belgium
[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[11] Univ Estado Rio de Janeiro, BR-20550011 Rio De Janeiro, Brazil
[12] Univ Estadual Paulista, Sao Paulo, Brazil
[13] Univ Fed ABC, Sao Paulo, Brazil
[14] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[15] Univ Sofia, BU-1126 Sofia, Bulgaria
[16] Inst High Energy Phys, Beijing 100039, Peoples R China
[17] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China
[18] Univ Los Andes, Bogota, Colombia
[19] Tech Univ Split, Split, Croatia
[20] Univ Split, Split, Croatia
[21] Rudjer Boskovic Inst, Zagreb, Croatia
[22] Univ Cyprus, Nicosia, Cyprus
[23] Charles Univ Prague, Prague, Czech Republic
[24] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
[25] NICPB, Tallinn, Estonia
[26] Univ Helsinki, Dept Phys, Helsinki, Finland
[27] Helsinki Inst Phys, Helsinki, Finland
[28] Lappeenranta Univ Technol, Lappeenranta, Finland
[29] CEA Saclay, DSM IRFU, F-91191 Gif Sur Yvette, France
[30] Ecole Polytech, CNRS, IN2P3, Lab Leprince Ringuet, F-91128 Palaiseau, France
[31] Univ Haute Alsace Mulhouse, Inst Pluridisciplinaire Hubert Curien, Univ Strasbourg, CNRS,IN2P3, Strasbourg, France
[32] Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France
[33] Tbilisi State Univ, Inst High Energy Phys & Informatizat, GE-380086 Tbilisi, Georgia
[34] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany
[35] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[36] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[37] DESY, Hamburg, Germany
[38] Univ Hamburg, Hamburg, Germany
[39] Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany
[40] Inst Nucl Phys Demokritos, Aghia Paraskevi, Greece
[41] Univ Athens, Athens, Greece
[42] Univ Ioannina, GR-45110 Ioannina, Greece
[43] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary
[44] Inst Nucl Res ATOMKI, Debrecen, Hungary
[45] Univ Debrecen, H-4012 Debrecen, Hungary
[46] Panjab Univ, Chandigarh 160014, India
[47] Univ Delhi, Delhi 110007, India
[48] Saha Inst Nucl Phys, Kolkata, India
[49] Bhabha Atom Res Ctr, Mumbai 400085, Maharashtra, India
[50] Tata Inst Fundamental Res, EHEP, Mumbai 400005, Maharashtra, India
基金
美国国家科学基金会; 芬兰科学院;
关键词
CMS; Physics; Resonances; Z '; Muons; Electrons; FERMION-PAIR PRODUCTION; E(+)E(-) COLLISIONS; CONSTRAINTS; PHYSICS;
D O I
10.1016/j.physletb.2013.02.003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at root s = 7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 fb(-1), respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model Z '(SSM) resonance lighter than 2590 GeV, a superstring-inspired Z '(psi) lighter than 2260 GeV, and Kaluza-Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/(M) over bar (Pl) is 0.10 (0.05). These are the most stringent limits to date. (C) 2013 CERN. Published by Elsevier B.V. All rights reserved.
引用
收藏
页码:63 / 82
页数:20
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