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

来源：

PHYSICS LETTERS B | 2017年 / 775卷

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

页码：315 / 337

页数：23

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