Search for the standard model Higgs boson produced in association with a W or a Z boson and decaying to bottom quarks

被引:147
|
作者
Chatrchyan, S. [1 ]
Khachatryan, V. [1 ]
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Bergauer, T. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Fabjan, C. [2 ,187 ]
Friedl, M. [2 ]
Fruehwirth, R. [2 ,187 ]
Ghete, V. M. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ,187 ]
Kiesenhofer, W. [2 ]
Knuenz, V. [2 ]
Krammer, M. [2 ,187 ]
Kraetschmer, I. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Rabady, D. [2 ,188 ]
Rahbaran, B. [2 ]
Rohringer, C. [2 ]
Rohringer, H. [2 ]
Schoefbeck, R. [2 ]
Strauss, J. [2 ]
Taurok, A. [2 ]
Treberer-Treberspurg, W. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ]
Mossolov, V. [3 ]
Shumeiko, N. [3 ]
Gonzalez, J. Suarez [3 ]
Alderweireldt, S. [4 ]
Bansal, M. [4 ]
Bansal, S. [4 ]
Cornelis, T. [4 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Knutsson, A. [4 ]
Luyckx, S. [4 ]
Mucibello, L. [4 ]
Ochesanu, S. [4 ]
Roland, B. [4 ]
Rougny, R. [4 ]
Staykova, Z. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
机构
[1] Yerevan Phys Inst, Yerevan 375036, Armenia
[2] Inst Hochenergiephys OeAW, Vienna, Austria
[3] Natl Ctr Particle & High Energy Phys, Minsk, BELARUS
[4] Univ Antwerp, B-2020 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] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, 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] CNRS IN2P3, Inst Natl Phys Nucl & Phys Particules, Ctr Calcul, Villeurbanne, France
[33] Univ Lyon 1, CNRS, IN2P3, Inst Phys Nucl Lyon, F-69622 Villeurbanne, France
[34] Tbilisi State Univ, Inst High Energy Phys & Informatizat, GE-380086 Tbilisi, Georgia
[35] Rhein Westfal TH Aachen, Inst Phys 1, Aachen, Germany
[36] Rhein Westfal TH Aachen, Inst Phys A 3, Aachen, Germany
[37] Rhein Westfal TH Aachen, Inst Phys B 3, Aachen, Germany
[38] DESY, Hamburg, Germany
[39] Univ Hamburg, Hamburg, Germany
[40] Univ Karlsruhe, Inst Expt Kernphys, Karlsruhe, Germany
[41] NCSR Demokritos, INPP, Aghia Paraskevi, Greece
[42] Univ Athens, Athens, Greece
[43] Univ Ioannina, GR-45110 Ioannina, Greece
[44] KFKI Res Inst Particle & Nucl Phys, Budapest, Hungary
[45] Inst Nucl Res ATOMKI, Debrecen, Hungary
[46] Univ Debrecen, H-4012 Debrecen, Hungary
[47] Natl Inst Sci Educ & Res, Bhubaneswar, Orissa, India
[48] Panjab Univ, Chandigarh 160014, India
[49] Univ Delhi, Delhi 110007, India
[50] Saha Inst Nucl Phys, Kolkata, India
基金
俄罗斯基础研究基金会; 中国国家自然科学基金; 芬兰科学院; 美国国家科学基金会; 英国科学技术设施理事会; 奥地利科学基金会; 巴西圣保罗研究基金会; 欧洲研究理事会;
关键词
PARTON DISTRIBUTIONS; BROKEN SYMMETRIES; GAUGE; MASSES;
D O I
10.1103/PhysRevD.89.012003
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A search for the standard model Higgs boson (H) decaying to b (b) over bar when produced in association with a weak vector boson (V) is reported for the following channels: W(mu nu)H, W(e nu)H, W(tau nu)H, Z(mu mu)H, Z(ee)H and Z(nu nu)H. The search is performed in data samples corresponding to integrated luminosities of up to 5.1 inverse femtobarns at root s = 7 TeV and up to 18.9 fb(-1) at root s = 8 TeV, recorded by the CMS experiment at the LHC. An excess of events is observed above the expected background with a local significance of 2.1 standard deviations for a Higgs boson mass of 125 GeV, consistent with the expectation from the production of the standard model Higgs boson. The signal strength corresponding to this excess, relative to that of the standard model Higgs boson, is 1.0 +/- 0.5.
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页数:36
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