https://doi.org/10.1140/epjc/s10052-020-08701-5
Regular Article - Experimental Physics
Search for top squark pair production using dilepton final states in 
collision data collected at 
1
Yerevan Physics Institute, Yerevan, Armenia
2
Institut für Hochenergiephysik, Vienna, Austria
3
Institute for Nuclear Problems, Minsk, Belarus
4
Universiteit Antwerpen, Antwerp, 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
Sun Yat-Sen University, Guangzhou, China
19
Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Fudan University, Shanghai, China
20
Zhejiang University, Hangzhou, China
21
Universidad de Los Andes, Bogota, Colombia
22
Universidad de Antioquia, Medellin, Colombia
23
University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia
24
University of Split, Faculty of Science, Split, Croatia
25
Institute Rudjer Boskovic, Zagreb, Croatia
26
University of Cyprus, Nicosia, Cyprus
27
Charles University, Prague, Czech Republic
28
Escuela Politecnica Nacional, Quito, Ecuador
29
Universidad San Francisco de Quito, Quito, Ecuador
30
Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt
31
Center for High Energy Physics (CHEP-FU), Fayoum University, El-Fayoum, Egypt
32
National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
33
Department of Physics, University of Helsinki, Helsinki, Finland
34
Helsinki Institute of Physics, Helsinki, Finland
35
Lappeenranta University of Technology, Lappeenranta, Finland
36
IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
37
Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Paris, France
38
Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
39
Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France
40
Georgian Technical University, Tbilisi, Georgia
41
RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
42
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
43
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
44
Deutsches Elektronen-Synchrotron, Hamburg, Germany
45
University of Hamburg, Hamburg, Germany
46
Karlsruher Institut fuer Technologie, Karlsruhe, Germany
47
Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
48
National and Kapodistrian University of Athens, Athens, Greece
49
National Technical University of Athens, Athens, Greece
50
University of Ioánnina, Ioánnina, Greece
51
MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary
52
Wigner Research Centre for Physics, Budapest, Hungary
53
Institute of Nuclear Research ATOMKI, Debrecen, Hungary
54
Institute of Physics, University of Debrecen, Debrecen, Hungary
55
Eszterhazy Karoly University, Karoly Robert Campus, Gyongyos, Hungary
56
Indian Institute of Science (IISc), Bangalore, India
57
National Institute of Science Education and Research, HBNI, Bhubaneswar, India
58
Panjab University, Chandigarh, India
59
University of Delhi, Delhi, India
60
Saha Institute of Nuclear Physics, HBNI, Kolkata, India
61
Indian Institute of Technology Madras, Madras, India
62
Bhabha Atomic Research Centre, Mumbai, India
63
Tata Institute of Fundamental Research-A, Mumbai, India
64
Tata Institute of Fundamental Research-B, Mumbai, India
65
Indian Institute of Science Education and Research (IISER), Pune, India
66
Department of Physics, Isfahan University of Technology, Isfahan, Iran
67
Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
68
University College Dublin, Dublin, Ireland
69
INFN Sezione di Bari , Università di Bari, Politecnico di Bari, Bari, Italy
70
INFN Sezione di Bologna, Università di Bologna, Bologna, Italy
71
INFN Sezione di Catania, Università di Catania, Catania, Italy
72
INFN Sezione di Firenze, Università di Firenze, Florence, Italy
73
INFN Laboratori Nazionali di Frascati, Frascati, Italy
74
INFN Sezione di Genova, Università di Genova, Genoa, Italy
75
INFN Sezione di Milano-Bicocca, Università di Milano-Bicocca, Milan, Italy
76
INFN Sezione di Napoli , Università di Napoli ’Federico II’ , Napoli, Italy, Università della Basilicata , Potenza, Italy, Università G. Marconi, Rome, Italy
77
INFN Sezione di Padova , Università di Padova , Padova, Italy, Università di Trento, Trento, Italy
78
INFN Sezione di Pavia, Università di Pavia, Pavia, Italy
79
INFN Sezione di Perugia, Università di Perugia, Perugia, Italy
80
INFN Sezione di Pisa , Università di Pisa, Scuola Normale Superiore di Pisa, Pisa, Italy
81
INFN Sezione di Roma, Sapienza Università di Roma, Rome, Italy
82
INFN Sezione di Torino , Università di Torino , Turin, Italy, Università del Piemonte Orientale, Novara, Italy
83
INFN Sezione di Trieste, Università di Trieste, Trieste, Italy
84
Kyungpook National University, Daegu, Korea
85
Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea
86
Hanyang University, Seoul, Korea
87
Korea University, Seoul, Korea
88
Kyung Hee University, Department of Physics, Seoul, Republic of Korea
89
Sejong University, Seoul, Korea
90
Seoul National University, Seoul, Korea
91
University of Seoul, Seoul, Korea
92
Department of Physics, Yonsei University, Seoul, Korea
93
Sungkyunkwan University, Suwon, Korea
94
Riga Technical University, Riga, Latvia
95
Vilnius University, Vilnius, Lithuania
96
National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia
97
Universidad de Sonora (UNISON), Hermosillo, Mexico
98
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
99
Universidad Iberoamericana, Mexico City, Mexico
100
Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
101
Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
102
University of Montenegro, Podgorica, Montenegro
103
University of Auckland, Auckland, New Zealand
104
University of Canterbury, Christchurch, New Zealand
105
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
106
AGH University of Science and Technology, Faculty of Computer Science, Electronics and Telecommunications, Krakow, Poland
107
National Centre for Nuclear Research, Swierk, Poland
108
Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
109
Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon, Portugal
110
Joint Institute for Nuclear Research, Dubna, Russia
111
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
112
Institute for Nuclear Research, Moscow, Russia
113
Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia
114
Moscow Institute of Physics and Technology, Moscow, Russia
115
National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia
116
P.N. Lebedev Physical Institute, Moscow, Russia
117
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
118
Novosibirsk State University (NSU), Novosibirsk, Russia
119
Institute for High Energy Physics of National Research Centre ‘Kurchatov Institute’, Protvino, Russia
120
National Research Tomsk Polytechnic University, Tomsk, Russia
121
Tomsk State University, Tomsk, Russia
122
University of Belgrade, Faculty of Physics and VINCA Institute of Nuclear Sciences, Belgrade, Serbia
123
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
124
Universidad Autónoma de Madrid, Madrid, Spain
125
Universidad de Oviedo, Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Oviedo, Spain
126
Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
127
University of Colombo, Colombo, Sri Lanka
128
Department of Physics, University of Ruhuna, Matara, Sri Lanka
129
CERN, European Organization for Nuclear Research, Geneva, Switzerland
130
Paul Scherrer Institut, Villigen, Switzerland
131
ETH Zurich, Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland
132
Universität Zürich, Zurich, Switzerland
133
National Central University, Chung-Li, Taiwan
134
National Taiwan University (NTU), Taipei, Taiwan
135
Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
136
Physics Department, Science and Art Faculty, Çukurova University, Adana, Turkey
137
Physics Department, Middle East Technical University, Ankara, Turkey
138
Bogazici University, Istanbul, Turkey
139
Istanbul Technical University, Istanbul, Turkey
140
Istanbul University, Istanbul, Turkey
141
Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine
142
National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine
143
University of Bristol, Bristol, UK
144
Rutherford Appleton Laboratory, Didcot, UK
145
Imperial College, London, UK
146
Brunel University, Uxbridge, UK
147
Baylor University, Waco, USA
148
Catholic University of America, Washington, DC, USA
149
The University of Alabama, Tuscaloosa, USA
150
Boston University, Boston, USA
151
Brown University, Providence, USA
152
University of California, Davis, Davis, USA
153
University of California, Los Angeles, USA
154
University of California, Riverside, Riverside, USA
155
University of California, San Diego, La Jolla, USA
156
Department of Physics, University of California, Santa Barbara, Santa Barbara, USA
157
California Institute of Technology, Pasadena, USA
158
Carnegie Mellon University, Pittsburgh, USA
159
University of Colorado Boulder, Boulder, USA
160
Cornell University, Ithaca, USA
161
Fermi National Accelerator Laboratory, Batavia, USA
162
University of Florida, Gainesville, USA
163
Florida State University, Tallahassee, USA
164
Florida Institute of Technology, Melbourne, USA
165
University of Illinois at Chicago (UIC), Chicago, USA
166
The University of Iowa, Iowa City, USA
167
Johns Hopkins University, Baltimore, USA
168
The University of Kansas, Lawrence, USA
169
Kansas State University, Manhattan, USA
170
Lawrence Livermore National Laboratory, Livermore, USA
171
University of Maryland, College Park, USA
172
Massachusetts Institute of Technology, Cambridge, USA
173
University of Minnesota, Minneapolis, USA
174
University of Mississippi, Oxford, USA
175
University of Nebraska-Lincoln, Lincoln, USA
176
State University of New York at Buffalo, Buffalo, USA
177
Northeastern University, Boston, USA
178
Northwestern University, Evanston, USA
179
University of Notre Dame, Notre Dame, USA
180
The Ohio State University, Columbus, USA
181
Princeton University, Princeton, USA
182
University of Puerto Rico, Mayaguez, USA
183
Purdue University, West Lafayette, USA
184
Purdue University Northwest, Hammond, USA
185
Rice University, Houston, USA
186
University of Rochester, Rochester, USA
187
Rutgers, The State University of New Jersey, Piscataway, USA
188
University of Tennessee, Knoxville, USA
189
Texas A&M University, College Station, USA
190
Texas Tech University, Lubbock, USA
191
Vanderbilt University, Nashville, USA
192
University of Virginia, Charlottesville, USA
193
Wayne State University, Detroit, USA
194
University of Wisconsin-Madison, Madison, WI, USA
195
CERN, 1211, Geneva 23, Switzerland
*
cms-publication-committee-chair@cern.ch
Received:
13
August
2020
Accepted:
28
October
2020
Published online:
5
January
2021
A search is presented for supersymmetric partners of the top quark (top squarks) in final states with two oppositely charged leptons (electrons or muons), jets identified as originating from 
quarks, and missing transverse momentum. The search uses data from proton-proton collisions at collected with the CMS detector, corresponding to an integrated luminosity of 137
. Hypothetical signal events are efficiently separated from the dominant top quark pair production background with requirements on the significance of the missing transverse momentum and on transverse mass variables. No significant deviation is observed from the expected background. Exclusion limits are set in the context of simplified supersymmetric models with pair-produced lightest top squarks. For top squarks decaying exclusively to a top quark and a lightest neutralino, lower limits are placed at 
confidence level on the masses of the top squark and the neutralino up to 925 and 450
, respectively. If the decay proceeds via an intermediate chargino, the corresponding lower limits on the mass of the lightest top squark are set up to 850 for neutralino masses below 420. For top squarks undergoing a cascade decay through charginos and sleptons, the mass limits reach up to 1.4
and 900 respectively for the top squark and the lightest neutralino.
© CERN for the benefit of the CMS collaboration 2020
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