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

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：

JOURNAL OF HIGH ENERGY PHYSICS | 2020年 / 06期

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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