W+ W- boson pair production in proton-proton collisions at √s=13 TeV

被引:29
|
作者
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Ambrogi, F. [2 ]
Bergauer, T. [2 ]
Dragicevic, M. [2 ]
Ero, J. [2 ]
Del Valle, A. Escalante [2 ]
Flechl, M. [2 ]
Fruhwirth, R. [2 ,217 ]
Jeitler, M. [2 ,217 ]
Kratschmer, I [2 ]
Liko, D. [2 ]
Madlener, T. [2 ]
Mikulec, I [2 ]
Rad, N. [2 ]
Schieck, J. [2 ,217 ]
Schofbeck, R. [2 ]
Spanring, M. [2 ]
Waltenberger, W. [2 ]
Wulz, C-E [2 ,217 ]
Zarucki, M. [2 ]
Drugakov, V [3 ]
Mossolov, V [3 ]
Gonzalez, J. Suarez [3 ]
Darwish, Mr [4 ]
De Wolf, Ea [4 ]
Di Croce, D. [4 ]
Janssen, X. [4 ]
Kello, T. [4 ,218 ]
Lelek, A. [4 ]
Pieters, M. [4 ]
Sfar, H. Rejeb [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, P. [4 ]
Van Putte, S. [4 ]
Van Remortel, N. [4 ]
Blekman, F. [5 ]
Bols, E. S. [5 ]
Chhibra, S. S. [5 ]
D'Hondt, J. [5 ]
De Clercq, J. [5 ]
Lontkovskyi, D. [5 ]
Lowette, S. [5 ]
Marchesini, I [5 ]
Moortgat, S. [5 ]
Python, Q. [5 ]
Tavernier, S. [5 ]
Van Doninck, W. [5 ]
Van Mulders, P. [5 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] Inst Hochenergiephys, Vienna, Austria
[3] Inst Nucl Problems, Minsk, BELARUS
[4] Univ Antwerp, Antwerp, Belgium
[5] Vrije Univ Brussel, Brussels, Belgium
[6] Univ Libre Bruxelles, Brussels, Belgium
[7] Univ Ghent, Ghent, Belgium
[8] Catholic Univ Louvain, Louvain La Neuve, Belgium
[9] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[10] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[11] Univ Estadual Paulista, Sao Paulo, Brazil
[12] Univ Fed ABC, Sao Paulo, Brazil
[13] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[14] Univ Sofia, Sofia, Bulgaria
[15] Beihang Univ, Beijing, Peoples R China
[16] Tsinghua Univ, Dept Phys, Beijing, Peoples R China
[17] Inst High Energy Phys, Beijing, Peoples R China
[18] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China
[19] Sun Yat Sen Univ, Guangzhou, Guangdong, Peoples R China
[20] Zhejiang Univ, Hangzhou, Peoples R China
[21] Univ Los Andes, Bogota, Colombia
[22] Univ Antioquia, Medellin, Colombia
[23] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[24] Univ Split, Fac Sci, Split, Croatia
[25] Inst Rudjer Boskovic, Zagreb, Croatia
[26] Univ Cyprus, Nicosia, Cyprus
[27] Charles Univ Prague, Prague, Czech Republic
[28] Escuela Politec Nacl, Quito, Ecuador
[29] Univ San Francisco Quito, Quito, Ecuador
[30] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt
[31] Fayoum Univ, Ctr High Energy Phys CHEP FU, Al Fayyum, Egypt
[32] NICPB, Tallinn, Estonia
[33] Univ Helsinki, Dept Phys, Helsinki, Finland
[34] Helsinki Inst Phys, Helsinki, Finland
[35] Lappeenranta Univ Technol, Lappeenranta, Finland
[36] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[37] Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, CNRS,IN2P3, Paris, France
[38] Univ Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
[39] Univ Lyon, Inst Phys Nucl Lyon, Univ Claude Bernard Lyon 1, CNRS,IN2P3, Villeurbanne, France
[40] Georgian Tech Univ, Tbilisi, Georgia
[41] Tbilisi State Univ, Tbilisi, Georgia
[42] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[43] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[44] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[45] DESY, Hamburg, Germany
[46] Univ Hamburg, Hamburg, Germany
[47] Karlsruher Inst Technol, Karlsruhe, Germany
[48] NCSR Demokritos, Inst Nucl & Particle Phys INPP, Aghia Paraskevi, Greece
[49] Natl & Kapodistrian Univ Athens, Athens, Greece
[50] Natl Tech Univ Athens, Athens, Greece
基金
芬兰科学院; 欧洲研究理事会; 巴西圣保罗研究基金会; 欧盟地平线“2020”;
关键词
D O I
10.1103/PhysRevD.102.092001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A measurement of the W+W- boson pair production cross section in proton-proton collisions at root s = 13 TeV is presented. The data used in this study are collected with the CMS detector at the CERN LHC and correspond to an integrated luminosity of 35.9 fb(-1). The W+W- candidate events are selected by requiring two oppositely charged leptons (electrons or muons). Two methods for reducing background contributions are employed. In the first one, a sequence of requirements on kinematic quantities is applied allowing a measurement of the total production cross section, 117.6 +/- 6.8 pb, which agrees well with the theoretical prediction. Fiducial cross sections are also reported for events with zero or one jet, and the change in the zero-jet fiducial cross section with the jet transverse momentum threshold is measured. Normalized differential cross sections are reported within the fiducial region. A second method for suppressing background contributions employs two random forest classifiers. The analysis based on this method includes a measurement of the total production cross section and also a measurement of the normalized jet multiplicity distribution in W+W- events. Finally, a dilepton invariant mass distribution is used to probe for physics beyond the standard model in the context of an effective field theory, and constraints on the presence of dimension-6 operators are derived.
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页数:30
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