Search for the Z Boson Decay to ττμμ in Proton-Proton Collisions at √s=13 TeV

被引:1
|
作者
Hayrapetyan, A. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Andrejkovic, J. W. [2 ]
Benato, L. [2 ]
Bergauer, T. [2 ]
Chatterjee, S. [2 ,64 ]
Damanakis, K. [2 ]
Dragicevic, M. [2 ]
Hussain, P. S. [2 ]
Jeitler, M. [2 ,209 ]
Krammer, N. [2 ]
Li, A. [2 ]
Liko, D. [2 ]
Mikulec, I. [2 ]
Schieck, J. [2 ,209 ]
Schoefbeck, R. [2 ,209 ]
Schwarz, D. [2 ]
Sonawane, M. [2 ]
Waltenberger, W. [2 ]
Wulz, C. -E. [2 ,209 ]
Janssen, T. [3 ]
Van Laer, T. [3 ]
Van Mechelen, P. [3 ]
Breugelmans, N. [4 ]
D'Hondt, J. [4 ]
Dansana, S. [4 ]
De Moor, A. [4 ]
Delcourt, M. [4 ]
Heyen, F. [4 ]
Lowette, S. [4 ]
Makarenko, I. [4 ]
Mueller, D. [4 ]
Tavernier, S. [4 ]
Tytgat, M. [4 ,210 ]
Van Onsem, G. P. [4 ]
Van Putte, S. [4 ]
Vannerom, D. [4 ]
Bilin, B. [5 ]
Clerbaux, B. [5 ]
Das, A. K. [5 ]
De Bruyn, I. [5 ]
De Lentdecker, G. [5 ]
Evard, H. [5 ]
Favart, L. [5 ]
Gianneios, P. [5 ,55 ]
Jaramillo, J. [5 ]
Khalilzadeh, A. [5 ]
Khan, F. A. [5 ]
Lee, K. [5 ,110 ]
机构
[1] Yerevan Phys Inst, Yerevan, Armenia
[2] Inst Hochenergiephys, Vienna, Austria
[3] Univ Antwerp, Antwerp, Belgium
[4] Vrije Univ Brussel, Brussels, Belgium
[5] Univ Libre Bruxelles, Brussels, Belgium
[6] Univ Ghent, Ghent, Belgium
[7] Catholic Univ Louvain, Louvain La Neuve, Belgium
[8] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[9] Univ Estado Rio de Janeiro, Rio De Janeiro, Brazil
[10] Univ Fed ABC, Univ Estadual Paulista, Sao Paulo, Brazil
[11] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, Sofia, Bulgaria
[12] Univ Sofia, Sofia, Bulgaria
[13] Univ Tarapaca, Inst Alta Invest, Casilla 7 D, Arica, Chile
[14] Beihang Univ, Beijing, Peoples R China
[15] Tsinghua Univ, Dept Phys, Beijing, Peoples R China
[16] Inst High Energy Phys, Beijing, Peoples R China
[17] Peking Univ, State Key Lab Nucl Phys & Technol, Beijing, Peoples R China
[18] South China Normal Univ, Guangdong Prov Key Lab Nucl Sci, Guangzhou, Peoples R China
[19] South China Normal Univ, Guangdong Hong Kong Joint Lab Quantum Matter, Guangzhou, Peoples R China
[20] Sun Yat Sen Univ, Guangzhou, Peoples R China
[21] Univ Sci & Technol China, Hefei, Peoples R China
[22] Nanjing Normal Univ, Nanjing, Peoples R China
[23] Fudan Univ, Inst Modern Phys, Shanghai, Peoples R China
[24] Fudan Univ, Key Lab Nucl Phys & Ion Beam Applicat MOE, Shanghai, Peoples R China
[25] Zhejiang Univ, Hangzhou, Zhejiang, Peoples R China
[26] Univ Los Andes, Bogota, Colombia
[27] Univ Antioquia, Medellin, Colombia
[28] Univ Split, Fac Elect Engn Mech Engn & Naval Architecture, Split, Croatia
[29] Univ Split, Fac Sci, Split, Croatia
[30] Inst Rudjer Boskovic, Zagreb, Croatia
[31] Univ Cyprus, Nicosia, Cyprus
[32] Charles Univ Prague, Prague, Czech Republic
[33] Univ San Francisco Quito, Quito, Ecuador
[34] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt
[35] Fayoum Univ, Ctr High Energy Phys CHEP FU, Al Fayyum, Egypt
[36] NICPB, Tallinn, Estonia
[37] Univ Helsinki, Dept Phys, Helsinki, Finland
[38] Helsinki Inst Phys, Helsinki, Finland
[39] Lappeenranta Lahti Univ Technol, Lappeenranta, Finland
[40] Univ Paris Saclay, CEA, IRFU, Gif Sur Yvette, France
[41] Ecole Polytech, Inst Polytech Paris, CNRS, Lab Leprince Ringuet,IN2P3, Palaiseau, France
[42] Univ Strasbourg, CNRS, IPHC, UMR 7178, Strasbourg, France
[43] CNRS, IN2P3, Inst Natl Phys Nucl & Phys Particules, Ctr Calcul, Villeurbanne, France
[44] Inst Phys 2 Infinis Lyon IP2I, Villeurbanne, France
[45] Georgian Tech Univ, Tbilisi, Georgia
[46] Rhein Westfal TH Aachen, Phys Inst 1, Aachen, Germany
[47] Rhein Westfal TH Aachen, Phys Inst A 3, Aachen, Germany
[48] Rhein Westfal TH Aachen, Phys Inst B 3, Aachen, Germany
[49] DESY, Hamburg, Germany
[50] Univ Hamburg, Hamburg, Germany
基金
巴西圣保罗研究基金会; 芬兰科学院;
关键词
PAIR;
D O I
10.1103/PhysRevLett.133.161805
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
The first search for the Z boson decay to tau tau mu mu at the CERN LHC is presented, based on data collected by the CMS experiment at the LHC in proton-proton collisions at a center-of-mass energy of 13 TeV and corresponding to an integrated luminosity of 138 fb(-1). The data are compatible with the predicted background. For the first time, an upper limit at the 95% confidence level of 6.9 times the standard model expectation is placed on the ratio of the Z -> tau tau mu mu to Z -> 4 mu branching fractions. Limits are also placed on the six flavor-conserving four-lepton effective-field-theory operators involving two muons and two tau leptons, for the first time testing all such operators.
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页数:20
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