Search for a heavy composite Majorana neutrino in the final state with two leptons and two quarks at √s=13 TeV

被引:12
作者
Sirunyan, A. M. [1 ]
Tumasyan, A. [1 ]
Adam, W. [2 ]
Ambrogi, F. [2 ]
Asilar, E. [2 ]
Bergauer, T. [2 ]
Brandstetter, J. [2 ]
Brondolin, E. [2 ]
Dragicevic, M. [2 ]
Ero, J. [2 ]
Flechl, M. [2 ]
Friedl, M. [2 ]
Fruhwirth, R. [2 ,200 ]
Ghete, V. M. [2 ]
Grossmann, J. [2 ]
Hormann, N. [2 ]
Hrubec, J. [2 ]
Jeitler, M. [2 ,200 ]
Konig, A. [2 ]
Kratschmer, I. [2 ]
Liko, D. [2 ]
Madlener, T. [2 ]
Mikulec, I. [2 ]
Pree, E. [2 ]
Rabady, D. [2 ]
Rad, N. [2 ]
Rohringer, H. [2 ]
Schieck, J. [2 ,200 ]
Schofbeck, R. [2 ]
Spanring, M. [2 ]
Spitzbart, D. [2 ]
Strauss, J. [2 ]
Waltenberger, W. [2 ]
Wittmann, J. [2 ]
Wulz, C. -E. [2 ,200 ]
Zarucki, M. [2 ]
Chekhovsky, V. [3 ]
Mossolov, V. [3 ]
Gonzalez, J. Suarez [3 ]
De Wolf, E. A. [4 ]
Janssen, X. [4 ]
Lauwers, J. [4 ]
De Klundert, M. Van [4 ]
Van Haevermaet, H. [4 ]
Van Mechelen, R. [4 ]
Van Remortel, N. [4 ]
Van Spilbeeck, A. [4 ]
Abu Zeid, S. [5 ]
Blekman, F. [5 ]
D'Hondt, J. [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] Univ Catholic Louvain, Louvain, Belgium
[9] Univ Mons, Mons, Belgium
[10] Ctr Brasileiro Pesquisas Fis, Rio De Janeiro, Brazil
[11] Univ Estado Rio de Janeiro, 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, Sofia, Bulgaria
[16] Beihang Univ, 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] Univ Los Andes, Bogota, Colombia
[20] Univ Split, Fac Elect Engn, Mech Engn & Naval Architecture, Split, Croatia
[21] Univ Split, Fac Sci, Split, Croatia
[22] Inst Rudjer Boskov, Zagreb, Croatia
[23] Univ Cyprus, Nicosia, Cyprus
[24] Charles Univ Prague, Prague, Czech Republic
[25] Univ San Francisco Quito, Quito, Ecuador
[26] Egyptian Network High Energy Phys, Acad Sci Res & Technol Arab Republ Egypt, Cairo, Egypt
[27] NICPB, Tallinn, Estonia
[28] Univ Helsinki, Dept Phys, Helsinki, Finland
[29] Helsinki Inst Phys, Helsinki, Finland
[30] Lappeenranta Univ Technol, Lappeenranta, Finland
[31] Univ Paris Saclay, IRFU, CEA, Gif Sur Yvette, France
[32] Univ Paris Saclay, Lab Leprince Ringuet, Ecole polytechn, CNRS IN2P3, Palaiseau, France
[33] Univ Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France
[34] Ctr Calcul Inst Natl Phys Nucleaire & Phys Partic, CNRS IN2P3, Villeurbanne, France
[35] Univ Lyon, Univ Claude Bernard Lyon, Inst Phys Nucl Lyon, CNRS IN2P3, Villeurbanne, France
[36] Georgian Tech Univ, Tbilisi, Georgia
[37] Tbilisi State Univ, Tbilisi, Georgia
[38] RWTH Aachen Univ I, Inst Phys, Aachen, Germany
[39] RWTH Aachen Univ III, Phys Inst A, Aachen, Germany
[40] RWTH Aachen Univ III, Phys Inst B, Aachen, Germany
[41] Deutsch Elekt Synchrotron, Hamburg, Germany
[42] Univ Hamburg, Hamburg, Germany
[43] Inst Expt Kernphys, Karlsruhe, Germany
[44] Inst Nucl & Particle Phys INPP, NCSR Demokritos, Aghia Paraskevi, Greece
[45] Natl & Kapodistrian Univ Athens, Athens, Greece
[46] Univ Ioannina, Ioannina, Greece
[47] Eotvos Lorand Univ, MTA ELTE Lendulet CMS Particle & Nucl Phys Grp, Budapest, Hungary
[48] Wigner Res Ctr Phys, Budapest, Hungary
[49] Inst Nucl Res ATOMKI, Debrecen, Hungary
[50] Univ Debrecen, Inst Phys, Debrecen, Hungary
基金
芬兰科学院; 美国国家科学基金会; 巴西圣保罗研究基金会;
关键词
CMS; Exotica; COLLISIONS; MODELS;
D O I
10.1016/j.physletb.2017.11.001
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A search for physics beyond the standard model in the final state with two same-flavour leptons (electrons or muons) and two quarks produced in proton-proton collisions at root s = 13 TeVis presented. The data were recorded by the CMS experiment at the CERN LHC and correspond to an integrated luminosity of 2.3 fb(-1). The observed data are in good agreement with the standard model background prediction. The results of the measurement are interpreted in the framework of a recently proposed model in which a heavy Majorana neutrino, N-l, stems from a composite-fermion scenario. Exclusion limits are set for the first time on the mass of the heavy composite Majorana neutrino, m(Nl), and the compositeness scale Lambda. For the case m(Nl) = Lambda, the existence of N-e (N-mu) is excluded for masses up to 4.60 (4.70) TeV at 95% confidence level. (C) 2017 The Author(s). Published by Elsevier B.V.
引用
收藏
页码:315 / 337
页数:23
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