https://doi.org/10.1140/epjc/s10052-020-8168-3
Regular Article - Experimental Physics
Search for physics beyond the standard model in events with jets and two same-sign or at least three charged leptons in proton-proton collisions at 
1
Yerevan Physics Institute, Yerevan, Armenia
2
Institut für Hochenergiephysik, Wien, Austria
3
Institute for Nuclear Problems, Minsk, Belarus
4
Universiteit Antwerpen, Antwerpen, Belgium
5
Vrije Universiteit Brussel, Brussels, Belgium
6
Université Libre de Bruxelles, Brussels, Belgium
7
Ghent University, Ghent, Belgium
8
Université Catholique de Louvain, Louvain-la-Neuve, Belgium
9
Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
10
Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
11
Universidade Estadual Paulista, Universidade Federal do ABC, São Paulo, Brazil
12
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria
13
University of Sofia, Sofia, Bulgaria
14
Beihang University, Beijing, China
15
Department of Physics, Tsinghua University, Beijing, China
16
Institute of High Energy Physics, Beijing, China
17
State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
18
Zhejiang University, Hangzhou, China
19
Universidad de Los Andes, Bogotá, Colombia
20
Universidad de Antioquia, Medellin, Colombia
21
University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia
22
University of Split, Faculty of Science, Split, Croatia
23
Institute Rudjer Boskovic, Zagreb, Croatia
24
University of Cyprus, Nicosia, Cyprus
25
Charles University, Prague, Czech Republic
26
Escuela Politecnica Nacional, Quito, Ecuador
27
Universidad San Francisco de Quito, Quito, Ecuador
28
Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt
29
National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
30
Department of Physics, University of Helsinki, Helsinki, Finland
31
Helsinki Institute of Physics, Helsinki, Finland
32
Lappeenranta University of Technology, Lappeenranta, Finland
33
IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
34
Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Paris, France
35
Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
36
Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France
37
CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, Villeurbanne, France
38
Georgian Technical University, Tbilisi, Georgia
39
Tbilisi State University, Tbilisi, Georgia
40
RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
41
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
42
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
43
Deutsches Elektronen-Synchrotron, Hamburg, Germany
44
University of Hamburg, Hamburg, Germany
45
Karlsruher Institut fuer Technologie, Karlsruhe, Germany
46
Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
47
National and Kapodistrian University of Athens, Athens, Greece
48
National Technical University of Athens, Athens, Greece
49
University of Ioánnina, Ioánnina, Greece
50
MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary
51
Wigner Research Centre for Physics, Budapest, Hungary
52
Institute of Nuclear Research ATOMKI, Debrecen, Hungary
53
Institute of Physics, University of Debrecen, Debrecen, Hungary
54
Eszterhazy Karoly University, Karoly Robert Campus, Gyongyos, Hungary
55
Indian Institute of Science (IISc), Bangalore, India
56
National Institute of Science Education and Research, HBNI, Bhubaneswar, India
57
Panjab University, Chandigarh, India
58
University of Delhi, Delhi, India
59
Saha Institute of Nuclear Physics, HBNI, Kolkata, India
60
Indian Institute of Technology Madras, Chennai, India
61
Bhabha Atomic Research Centre, Mumbai, India
62
Tata Institute of Fundamental Research-A, Mumbai, India
63
Tata Institute of Fundamental Research-B, Mumbai, India
64
Indian Institute of Science Education and Research (IISER), Pune, India
65
Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
66
University College Dublin, Dublin, Ireland
67
INFN Sezione di Bari, Università di Bari, Politecnico di Bari, Bari, Italy
68
INFN Sezione di Bologna, Università di Bologna, Bologna, Italy
69
INFN Sezione di Catania, Università di Catania, Catania, Italy
70
INFN Sezione di Firenze, Università di Firenze, Firenze, Italy
71
INFN Laboratori Nazionali di Frascati, Frascati, Italy
72
INFN Sezione di Genova, Università di Genova, Genoa, Italy
73
INFN Sezione di Milano-Bicocca, Università di Milano-Bicocca, Milan, Italy
74
INFN Sezione di Napoli, Università di Napoli ‘Federico II’, Napoli, Italy, Università della Basilicata, Potenza, Italy, Università G. Marconi, Rome, Italy
75
INFN Sezione di Padova, Università di Padova, Padova, Italy, Università di Trento, Trento, Italy
76
INFN Sezione di Pavia, Università di Pavia, Pavia, Italy
77
INFN Sezione di Perugia, Università di Perugia, Perugia, Italy
78
INFN Sezione di Pisa, Università di Pisa, Scuola Normale Superiore di Pisa, Pisa, Italy
79
INFN Sezione di Roma, Sapienza Università di Roma, Rome, Italy
80
INFN Sezione di Torino, Università di Torino, Torino, Italy, Università del Piemonte Orientale, Novara, Italy
81
INFN Sezione di Trieste, Università di Trieste, Trieste, Italy
82
Kyungpook National University, Daegu, Korea
83
Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea
84
Hanyang University, Seoul, Korea
85
Korea University, Seoul, Korea
86
Department of Physics, Kyung Hee University, Seoul, Korea
87
Sejong University, Seoul, Korea
88
Seoul National University, Seoul, Korea
89
University of Seoul, Seoul, Korea
90
Sungkyunkwan University, Suwon, Korea
91
Riga Technical University, Riga, Latvia
92
Vilnius University, Vilnius, Lithuania
93
National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia
94
Universidad de Sonora (UNISON), Hermosillo, Mexico
95
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
96
Universidad Iberoamericana, Mexico City, Mexico
97
Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
98
Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
99
University of Montenegro, Podgorica, Montenegro
100
University of Auckland, Auckland, New Zealand
101
University of Canterbury, Christchurch, New Zealand
102
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
103
AGH University of Science and Technology Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland
104
National Centre for Nuclear Research, Swierk, Poland
105
Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
106
Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon, Portugal
107
Joint Institute for Nuclear Research, Dubna, Russia
108
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
109
Institute for Nuclear Research, Moscow, Russia
110
Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia
111
Moscow Institute of Physics and Technology, Moscow, Russia
112
National Research Nuclear University ‘Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia
113
P.N. Lebedev Physical Institute, Moscow, Russia
114
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
115
Novosibirsk State University (NSU), Novosibirsk, Russia
116
Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’, Protvino, Russia
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National Research Tomsk Polytechnic University, Tomsk, Russia
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Tomsk State University, Tomsk, Russia
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Faculty of Physics and VINCA Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
120
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
121
Universidad Autónoma de Madrid, Madrid, Spain
122
Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Universidad de Oviedo, Oviedo, Spain
123
Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
124
University of Colombo, Colombo, Sri Lanka
125
Department of Physics, University of Ruhuna, Matara, Sri Lanka
126
CERN, European Organization for Nuclear Research, Geneva, Switzerland
127
Paul Scherrer Institut, Villigen, Switzerland
128
ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland
129
Universität Zürich, Zurich, Switzerland
130
National Central University, Chung-Li, Taiwan
131
National Taiwan University (NTU), Taipei, Taiwan
132
Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
133
Physics Department, Science and Art Faculty, Çukurova University, Adana, Turkey
134
Physics Department, Middle East Technical University, Ankara, Turkey
135
Bogazici University, Istanbul, Turkey
136
Istanbul Technical University, Istanbul, Turkey
137
Istanbul University, Istanbul, Turkey
138
Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine
139
National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine
140
University of Bristol, Bristol, UK
141
Rutherford Appleton Laboratory, Didcot, UK
142
Imperial College, London, UK
143
Brunel University, Uxbridge, UK
144
Baylor University, Waco, USA
145
Catholic University of America, Washington, DC, USA
146
The University of Alabama, Tuscaloosa, USA
147
Boston University, Boston, USA
148
Brown University, Providence, USA
149
University of California, Davis, Davis, USA
150
University of California, Los Angeles, USA
151
University of California, Riverside, Riverside, USA
152
University of California, San Diego, La Jolla, USA
153
Department of Physics, University of California, Santa Barbara, Santa Barbara, USA
154
California Institute of Technology, Pasadena, USA
155
Carnegie Mellon University, Pittsburgh, USA
156
University of Colorado Boulder, Boulder, USA
157
Cornell University, Ithaca, USA
158
Fermi National Accelerator Laboratory, Batavia, USA
159
University of Florida, Gainesville, USA
160
Florida International University, Miami, USA
161
Florida State University, Tallahassee, USA
162
Florida Institute of Technology, Melbourne, USA
163
University of Illinois at Chicago (UIC), Chicago, USA
164
The University of Iowa, Iowa City, USA
165
Johns Hopkins University, Baltimore, USA
166
The University of Kansas, Lawrence, USA
167
Kansas State University, Manhattan, USA
168
Lawrence Livermore National Laboratory, Livermore, USA
169
University of Maryland, College Park, USA
170
Massachusetts Institute of Technology, Cambridge, USA
171
University of Minnesota, Minneapolis, USA
172
University of Mississippi, Oxford, USA
173
University of Nebraska-Lincoln, Lincoln, USA
174
State University of New York at Buffalo, Buffalo, USA
175
Northeastern University, Boston, USA
176
Northwestern University, Evanston, USA
177
University of Notre Dame, Notre Dame, USA
178
The Ohio State University, Columbus, USA
179
Princeton University, Princeton, USA
180
University of Puerto Rico, Mayaguez, USA
181
Purdue University, West Lafayette, USA
182
Purdue University Northwest, Hammond, USA
183
Rice University, Houston, USA
184
University of Rochester, Rochester, USA
185
Rutgers, The State University of New Jersey, Piscataway, USA
186
University of Tennessee, Knoxville, USA
187
Texas A&M University, College Station, USA
188
Texas Tech University, Lubbock, USA
189
Vanderbilt University, Nashville, USA
190
University of Virginia, Charlottesville, USA
191
Wayne State University, Detroit, USA
192
University of Wisconsin-Madison, Madison, WI, USA
193
CERN, 1211, Geneva 23, Switzerland
* e-mail: cms-publication-committee-chair@cern.ch
Received:
27
January
2020
Accepted:
18
June
2020
Published online:
18
August
2020
A data sample of events from proton-proton collisions with at least two jets, and two isolated same-sign or three or more charged leptons, is studied in a search for signatures of new physics phenomena. The data correspond to an integrated luminosity of 
at a center-of-mass energy of 
, collected in 2016–2018 by the CMS experiment at the LHC. The search is performed using a total of 168 signal regions defined using several kinematic variables. The properties of the events are found to be consistent with the expectations from standard model processes. Exclusion limits at 95% confidence level are set on cross sections for the pair production of gluinos or squarks for various decay scenarios in the context of supersymmetric models conserving or violating R parity. The observed lower mass limits are as large as 
for gluinos and 
for top and bottom squarks. To facilitate reinterpretations, model-independent limits are provided in a set of simplified signal regions.
© CERN for the benefit of the CMS collaboration, 2020
