https://doi.org/10.1140/epjc/s10052-018-6148-7
Regular Article - Experimental Physics
Measurement of the weak mixing angle using the forward–backward asymmetry of Drell–Yan events in 
collisions at 8
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, Brussel, 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
Institute of High Energy Physics, Beijing, China
16
State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
17
Tsinghua University, Beijing, China
18
Universidad de Los Andes, Bogotá, Colombia
19
University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia
20
University of Split, Faculty of Science, Split, Croatia
21
Institute Rudjer Boskovic, Zagreb, Croatia
22
University of Cyprus, Nicosia, Cyprus
23
Charles University, Prague, Czech Republic
24
Escuela Politecnica Nacional, Quito, Ecuador
25
Universidad San Francisco de Quito, Quito, Ecuador
26
Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt
27
National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
28
Department of Physics, University of Helsinki, Helsinki, Finland
29
Helsinki Institute of Physics, Helsinki, Finland
30
Lappeenranta University of Technology, Lappeenranta, Finland
31
IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
32
Laboratoire Leprince-Ringuet, Ecole Polytechnique, CNRS/IN2P3, Université Paris-Saclay, Palaiseau, France
33
Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
34
Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France
35
Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Institut de Physique Nucléaire de Lyon, Villeurbanne, France
36
Georgian Technical University, Tbilisi, Georgia
37
Tbilisi State University, Tbilisi, Georgia
38
RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
39
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
40
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
41
Deutsches Elektronen-Synchrotron, Hamburg, Germany
42
University of Hamburg, Hamburg, Germany
43
Karlsruher Institut fuer Technology, Karlsruhe, Germany
44
Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
45
National and Kapodistrian University of Athens, Athens, Greece
46
National Technical University of Athens, Athens, Greece
47
University of Ioánnina, Ioannina, Greece
48
MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary
49
Wigner Research Centre for Physics, Budapest, Hungary
50
Institute of Nuclear Research ATOMKI, Debrecen, Hungary
51
Institute of Physics, University of Debrecen, Debrecen, Hungary
52
Indian Institute of Science (IISc), Bangalore, India
53
National Institute of Science Education and Research, HBNI, Bhubaneswar, India
54
Panjab University, Chandigarh, India
55
University of Delhi, Delhi, India
56
Saha Institute of Nuclear Physics, HBNI, Kolkata, India
57
Indian Institute of Technology Madras, Chennai, India
58
Bhabha Atomic Research Centre, Mumbai, India
59
Tata Institute of Fundamental Research-A, Mumbai, India
60
Tata Institute of Fundamental Research-B, Mumbai, India
61
Indian Institute of Science Education and Research (IISER), Pune, India
62
Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
63
University College Dublin, Dublin, Ireland
64
INFN Sezione di Bari, Università di Bari, Politecnico di Bari, Bari, Italy
65
INFN Sezione di Bologna, Università di Bologna, Bologna, Italy
66
INFN Sezione di Catania, Università di Catania, Catania, Italy
67
INFN Sezione di Firenze, Università di Firenze, Florence, Italy
68
INFN Laboratori Nazionali di Frascati, Frascati, Italy
69
INFN Sezione di Genova, Università di Genova, Genoa, Italy
70
INFN Sezione di Milano-Bicocca, Università di Milano-Bicocca, Milan, Italy
71
INFN Sezione di Napoli, Università di Napoli ’Federico II’ , Napoli, Italy, Università della Basilicata, Potenza, Italy, Università G. Marconi, Rome, Italy
72
INFN Sezione di Padova, Università di Padova, Padova, Italy, Università di Trento, Trento, Italy
73
INFN Sezione di Pavia, Università di Pavia, Pavia, Italy
74
INFN Sezione di Perugia, Università di Perugia, Perugia, Italy
75
INFN Sezione di Pisa, Università di Pisa, Scuola Normale Superiore di Pisa, Pisa, Italy
76
INFN Sezione di Roma, Università di Roma, Rome, Italy
77
INFN Sezione di Torino, Università di Torino, Turin, Italy, Università del Piemonte Orientale, Novara, Italy
78
INFN Sezione di Trieste, Università di Trieste, Trieste, Italy
79
Kyungpook National University, Daegu, Korea
80
Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea
81
Hanyang University, Seoul, Korea
82
Korea University, Seoul, Korea
83
Sejong University, Seoul, Korea
84
Seoul National University, Seoul, Korea
85
University of Seoul, Seoul, Korea
86
Sungkyunkwan University, Suwon, Korea
87
Vilnius University, Vilnius, Lithuania
88
National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia
89
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
90
Universidad Iberoamericana, Mexico City, Mexico
91
Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
92
Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
93
University of Auckland, Auckland, New Zealand
94
University of Canterbury, Christchurch, New Zealand
95
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
96
National Centre for Nuclear Research, Swierk, Poland
97
Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
98
Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon, Portugal
99
Joint Institute for Nuclear Research, Dubna, Russia
100
Petersburg Nuclear Physics Institute, Gatchina, (St. Petersburg), Russia
101
Institute for Nuclear Research, Moscow, Russia
102
Institute for Theoretical and Experimental Physics, Moscow, Russia
103
Moscow Institute of Physics and Technology, Moscow, Russia
104
National Research Nuclear University ‘Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia
105
P.N. Lebedev Physical Institute, Moscow, Russia
106
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
107
Novosibirsk State University (NSU), Novosibirsk, Russia
108
State Research Center of Russian Federation, Institute for High Energy Physics of NRC “Kurchatov Institute”, Protvino, Russia
109
National Research Tomsk Polytechnic University, Tomsk, Russia
110
University of Belgrade, Faculty of Physics and Vinca Institute of Nuclear Sciences, Belgrade, Serbia
111
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
112
Universidad Autónoma de Madrid, Madrid, Spain
113
Universidad de Oviedo, Oviedo, Spain
114
Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
115
CERN, European Organization for Nuclear Research, Geneva, Switzerland
116
Paul Scherrer Institut, Villigen, Switzerland
117
ETH Zurich - Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland
118
Universität Zürich, Zurich, Switzerland
119
National Central University, Chung-Li, Taiwan
120
National Taiwan University (NTU), Taipei, Taiwan
121
Chulalongkorn University, Faculty of Science, Department of Physics, Bangkok, Thailand
122
Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey
123
Middle East Technical University, Physics Department, Ankara, Turkey
124
Bogazici University, Istanbul, Turkey
125
Istanbul Technical University, Istanbul, Turkey
126
Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkov, Ukraine
127
National Scientific Center, Kharkov Institute of Physics and Technology, Kharkov, Ukraine
128
University of Bristol, Bristol, UK
129
Rutherford Appleton Laboratory, Didcot, UK
130
Imperial College, London, UK
131
Brunel University, Uxbridge, UK
132
Baylor University, Waco, USA
133
Catholic University of America, Washington, DC, USA
134
The University of Alabama, Tuscaloosa, USA
135
Boston University, Boston, USA
136
Brown University, Providence, USA
137
University of California, Davis, Davis, USA
138
University of California, Los Angeles, USA
139
University of California, Riverside, Riverside, USA
140
University of California, San Diego, LJ, USA
141
University of California, Santa Barbara - Department of Physics, Santa Barbara, USA
142
California Institute of Technology, Pasadena, USA
143
Carnegie Mellon University, Pittsburgh, USA
144
University of Colorado Boulder, Boulder, USA
145
Cornell University, Ithaca, USA
146
Fermi National Accelerator Laboratory, Batavia, USA
147
University of Florida, Gainesville, USA
148
Florida International University, Miami, USA
149
Florida State University, Tallahassee, USA
150
Florida Institute of Technology, Melbourne, USA
151
University of Illinois at Chicago (UIC), Chicago, USA
152
The University of Iowa, Iowa City, USA
153
Johns Hopkins University, Baltimore, USA
154
The University of Kansas, Lawrence, USA
155
Kansas State University, Manhattan, USA
156
Lawrence Livermore National Laboratory, Livermore, USA
157
University of Maryland, College Park, USA
158
Massachusetts Institute of Technology, Cambridge, USA
159
University of Minnesota, Minneapolis, USA
160
University of Mississippi, Oxford, USA
161
University of Nebraska-Lincoln, Lincoln, USA
162
State University of New York at Buffalo, Buffalo, USA
163
Northeastern University, Boston, USA
164
Northwestern University, Evanston, USA
165
University of Notre Dame, Notre Dame, USA
166
The Ohio State University, Columbus, USA
167
Princeton University, Princeton, USA
168
University of Puerto Rico, Mayagüez, USA
169
Purdue University, West Lafayette, USA
170
Purdue University Northwest, Hammond, USA
171
Rice University, Houston, USA
172
University of Rochester, Rochester, USA
173
Rutgers, The State University of New Jersey, Piscataway, USA
174
University of Tennessee, Knoxville, USA
175
Texas A&M University, College Station, USA
176
Texas Tech University, Lubbock, USA
177
Vanderbilt University, Nashville, USA
178
University of Virginia, Charlottesville, USA
179
Wayne State University, Detroit, USA
180
University of Wisconsin-Madison, Madison, WI, USA
181
CERN, 1211, Geneva 23, Switzerland
* e-mail: cms-publication-committee-chair@cern.ch
Received:
3
June
2018
Accepted:
10
August
2018
Published online:
1
September
2018
A measurement is presented of the effective leptonic weak mixing angle (
) using the forward–backward asymmetry of Drell–Yan lepton pairs (
and 
) produced in proton–proton collisions at 
at the CMS experiment of the LHC. The data correspond to integrated luminosities of 18.8 and 
in the dimuon and dielectron channels, respectively, containing 8.2 million dimuon and 4.9 million dielectron events. With more events and new analysis techniques, including constraints obtained on the parton distribution functions from the measured forward–backward asymmetry, the statistical and systematic uncertainties are significantly reduced relative to previous CMS measurements. The extracted value of from the combined dilepton data is 
.
© CERN for the benefit of the CMS collaboration, 2018
