Measurement of the Zγ production cross section in pp collisions at 8 TeV and search for anomalous triple gauge boson couplings

被引:12
|
作者
Khachatryan, V. [1 ]
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Bergauer, T. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Friedl, M. [2 ]
Fruehwirth, R. [2 ,188 ]
Ghete, V. M. [2 ]
Hartl, C. [2 ]
Hoermann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ,188 ]
Kiesenhofer, W. [2 ]
Knuenz, V. [2 ]
Krammer, M. [2 ,188 ]
Kraetschmer, I. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Rabady, D. [2 ,189 ]
Rahbaran, B. [2 ]
Rohringer, H. [2 ]
Schoefbeck, R. [2 ]
Strauss, J. [2 ]
Treberer-Treberspurg, W. [2 ]
Waltenberger, W. [2 ]
Wulz, C-E. [2 ,188 ]
Mossolov, V. [3 ]
Shumeiko, N. [3 ]
Gonzalez, J. Suarez [3 ]
Alderweireldt, S. [4 ]
Bansal, S. [4 ]
Cornelis, T. [4 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Knutsson, A. [4 ]
Lauwers, J. [4 ]
Luyckx, S. [4 ]
Ochesanu, S. [4 ]
Rougny, R. [4 ]
Van De Klundert, M. [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Remortel, N. [4 ]
Van Spilbeeck, A. [4 ]
Blekman, F. [5 ]
Blyweert, S. [5 ]
D'Hondt, J. [5 ]
Daci, N. [5 ]
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, 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] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[20] Univ Split, Fac Sci, Split, Croatia
[21] Rudjer Boskovic Inst, Zagreb, Croatia
[22] Univ Cyprus, CY-1678 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 Strasbourg, Univ Haute Alsace Mulhouse, CNRS, Inst Pluridisciplinaire Hubert Curien,IN2P3, Strasbourg, France
[32] Inst Natl Phys Nucl & Phys Particules, CNRS, IN2P3, 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, Phys Inst 1, Aachen, Germany
[36] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[37] Rhein Westfal TH Aachen, Phys Inst 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] Wigner Res Ctr 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
来源
基金
芬兰科学院; 奥地利科学基金会; 美国国家科学基金会; 俄罗斯基础研究基金会; 英国科学技术设施理事会; 欧洲研究理事会; 巴西圣保罗研究基金会; 中国国家自然科学基金; 新加坡国家研究基金会;
关键词
Hadron-Hadron Scattering; HADRON COLLIDERS; RECONSTRUCTION; E(+)E(-);
D O I
10.1007/JHEP04(2015)164
中图分类号
O412 [相对论、场论]; O572.2 [粒子物理学];
学科分类号
摘要
The cross section for the production of Z gamma in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb(-1). Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. The differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. The observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. Limits on anomalous triple gauge couplings of ZZ gamma and Z gamma gamma are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.
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页数:40
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