Measurement of the cross section for electroweak production of a Z boson, a photon and two jets in proton-proton collisions at √s=13TeV and constraints on anomalous quartic couplings

被引:0
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作者
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Ambrogi, F. [2 ]
Bergauer, T. [2 ]
Brandstetter, J. [2 ]
Dragicevic, M. [2 ]
Eroe, J. [2 ]
Del Valle, A. Escalante [2 ]
Flechl, M. [2 ]
Fruehwirth, R. [2 ,214 ]
Jeitler, M. [2 ,214 ]
Krammer, N. [2 ]
Kraetschmer, I [2 ]
Liko, D. [2 ]
Madlener, T. [2 ]
Mikulec, I [2 ]
Rad, N. [2 ]
Schieck, J. [2 ,214 ]
Schoefbeck, R. [2 ]
Spanring, M. [2 ]
Spitzbart, D. [2 ]
Waltenberger, W. [2 ]
Wulz, C-E [2 ,214 ]
Zarucki, M. [2 ]
Drugakov, V [3 ]
Mossolov, V [3 ]
Gonzalez, J. Suarez [3 ]
Darwish, M. R. [4 ]
De Wolf, E. A. [4 ]
Di Croce, D. [4 ]
Janssen, X. [4 ]
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 ]
Skovpen, K. [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] Zhejiang Univ, Hangzhou, Peoples R China
[20] Univ Los Andes, Bogota, Colombia
[21] Univ Antioquia, Medellin, Colombia
[22] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[23] Univ Split, Fac Sci, Split, Croatia
[24] Inst Rudjer Boskovic, Zagreb, Croatia
[25] Univ Cyprus, Nicosia, Cyprus
[26] Charles Univ Prague, Prague, Czech Republic
[27] Escuela Politec Nacl, Quito, Ecuador
[28] Univ San Francisco Quito, Quito, Ecuador
[29] Acad Sci Res & Technol Arab Republ Egypt, Egyptian Network High Energy Phys, Cairo, Egypt
[30] NICPB, Tallinn, Estonia
[31] Univ Helsinki, Dept Phys, Helsinki, Finland
[32] Helsinki Inst Phys, Helsinki, Finland
[33] Lappeenranta Univ Technol, Lappeenranta, Finland
[34] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[35] Inst Polytech Paris, Lab Leprince Ringuet, Ecole Polytech, IN2P3,CNRS, Paris, France
[36] Univ Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
[37] Inst Natl Phys Nucl & Phys Particules, IN2P3, CNRS, Ctr Calcul, Villeurbanne, France
[38] Univ Lyon, Univ Claude Bernard Lyon 1, Inst Phys Nucl Lyon, CNRS,IN2P3, Villeurbanne, France
[39] Georgian Tech Univ, Tbilisi, Georgia
[40] Tbilisi State Univ, Tbilisi, Georgia
[41] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[42] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[43] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[44] DESY, Hamburg, Germany
[45] Univ Hamburg, Hamburg, Germany
[46] Karlsruher Inst Technol, Karlsruhe, Germany
[47] NCSR Demokritos, Inst Nucl & Particle Phys INPP, Aghia Paraskevi, Greece
[48] Natl & Kapodistrian Univ Athens, Athens, Greece
[49] Natl Tech Univ Athens, Athens, Greece
[50] Univ Ioannina, Ioannina, Greece
来源
基金
欧洲研究理事会; 欧盟地平线“2020”; 巴西圣保罗研究基金会; 芬兰科学院;
关键词
Electroweak interaction; Hadron-Hadron scattering (experiments); ASSOCIATION;
D O I
10.1007/JHEP06(2020)076
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
A measurement is presented of the cross section for electroweak production of a Z boson and a photon in association with two jets (Z gamma jj) in proton-proton collisions. The Z boson candidates are selected through their decay into a pair of electrons or muons. The process of interest, electroweak Z gamma jj production, is isolated by selecting events with a large dijet mass and a large pseudorapidity gap between the two jets. The measurement is based on data collected at the CMS experiment at root s = 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1). The observed significance of the signal is 3.9 standard deviations, where a significance of 5.2 standard deviations is expected in the standard model. These results are combined with published results by CMS at root s = 8 TeV, which leads to observed and expected respective significances of 4.7 and 5.5 standard deviations. From the 13 TeV data, a value is obtained for the signal strength of electroweak Z gamma jj production and bounds are given on quartic vector boson interactions in the framework of dimension-eight effective field theory operators.
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