https://doi.org/10.1140/epjc/s10052-022-10897-7
Regular Article - Experimental Physics
Measurements of the associated production of a W boson and a charm quark in proton–proton collisions at 
1
Yerevan Physics Institute, Yerevan, Armenia
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Institut für Hochenergiephysik, Vienna, Austria
3
Institute for Nuclear Problems, Minsk, Belarus
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Universiteit Antwerpen, Antwerpen, Belgium
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Vrije Universiteit Brussel, Brussel, Belgium
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Université Libre de Bruxelles, Bruxelles, Belgium
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Ghent University, Ghent, Belgium
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Université Catholique de Louvain, Louvain-la-Neuve, Belgium
9
Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
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Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
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Universidade Estadual Paulista (a), Universidade Federal do ABC (b), São Paulo, Brazil
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Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria
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University of Sofia, Sofia, Bulgaria
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Beihang University, Beijing, China
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Department of Physics, Tsinghua University, Beijing, China
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Institute of High Energy Physics, Beijing, China
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State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
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Sun Yat-Sen University, Guangzhou, China
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Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE), Fudan University, Shanghai, China
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Zhejiang University, Hangzhou, China, Zhejiang, China
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Universidad de Los Andes, Bogota, Colombia
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Universidad de Antioquia, Medellin, Colombia
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University of Split, Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, Split, Croatia
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University of Split, Faculty of Science, Split, Croatia
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Institute Rudjer Boskovic, Zagreb, Croatia
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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
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Helsinki Institute of Physics, Helsinki, Finland
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Lappeenranta University of Technology, Lappeenranta, Finland
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IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
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Laboratoire Leprince-Ringuet, CNRS/IN2P3, Ecole Polytechnique, Institut Polytechnique de Paris, Palaiseau, France
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Université de Strasbourg, CNRS, IPHC UMR 7178, Strasbourg, France
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Institut de Physique des 2 Infinis de Lyon (IP2I ), Villeurbanne, France
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Georgian Technical University, Tbilisi, Georgia
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RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
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RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
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RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
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Deutsches Elektronen-Synchrotron, Hamburg, Germany
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University of Hamburg, Hamburg, Germany
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Karlsruher Institut fuer Technologie, Karlsruhe, Germany
47
Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
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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
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Wigner Research Centre for Physics, Budapest, Hungary
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Institute of Nuclear Research ATOMKI, Debrecen, Hungary
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Institute of Physics, University of Debrecen, Debrecen, Hungary
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Karoly Robert Campus, MATE Institute of Technology, Gyongyos, Hungary
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Indian Institute of Science (IISc), Bangalore, India
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National Institute of Science Education and Research, HBNI, Bhubaneswar, India
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Panjab University, Chandigarh, India
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University of Delhi, Delhi, India
60
Saha Institute of Nuclear Physics, HBNI, Kolkata, India
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Indian Institute of Technology Madras, Madras, India
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Bhabha Atomic Research Centre, Mumbai, India
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Tata Institute of Fundamental Research-A, Mumbai, India
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Tata Institute of Fundamental Research-B, Mumbai, India
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Indian Institute of Science Education and Research (IISER), Pune, India
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Isfahan University of Technology, Isfahan, Iran
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Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
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University College Dublin, Dublin, Ireland
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INFN Sezione di Bari, Università di Bari, Politecnico di Bari, Bari, Italy
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INFN Sezione di Bologna, Università di Bologna, Bologna, Italy
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INFN Sezione di Catania, Università di Catania, Catania, Italy
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INFN Sezione di Firenze, Università di Firenze, Firenze, Italy
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INFN Laboratori Nazionali di Frascati, Frascati, Italy
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INFN Sezione di Genova, Università di Genova, Genoa, Italy
75
INFN Sezione di Milano-Bicocca, Università di Milano-Bicocca, Milan, Italy
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INFN Sezione di Napoli, Università di Napoli ‘Federico II’, Napoli, Italy, Università della Basilicata, Potenza, Italy, Università G. Marconi, Rome, Italy
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INFN Sezione di Padova, Università di Padova, Padova, Italy, Università di Trento, Trento, Italy
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INFN Sezione di Pavia, Università di Pavia, Pavia, Italy
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INFN Sezione di Perugia, Università di Perugia, Perugia, Italy
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INFN Sezione di Pisa, Università di Pisa, Scuola Normale Superiore di Pisa, Pisa, Italy, Università di Siena, Siena, Italy
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INFN Sezione di Roma, Sapienza Università di Roma, Rome, Italy
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INFN Sezione di Torino, Università di Torino, Torino, Italy, Università del Piemonte Orientale, Novara, Italy
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INFN Sezione di Trieste, Università di Trieste, Trieste, Italy
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Kyungpook National University, Daegu, Korea
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Chonnam National University, Institute for Universe and Elementary Particles, Kwangju, Korea
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Hanyang University, Seoul, Korea
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Korea University, Seoul, Korea
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Kyung Hee University, Department of Physics, Seoul, Republic of Korea, Seoul, Korea
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Sejong University, Seoul, Korea
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Seoul National University, Seoul, Korea
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University of Seoul, Seoul, Korea
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Department of Physics, Yonsei University, Seoul, Korea
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Sungkyunkwan University, Suwon, Korea
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College of Engineering and Technology, American University of the Middle East (AUM), Egaila, Kuwait, Dasman, Kuwait
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Riga Technical University, Riga, Latvia
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Vilnius University, Vilnius, Lithuania
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National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia
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Universidad de Sonora (UNISON), Hermosillo, Mexico
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Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
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Universidad Iberoamericana, Mexico City, Mexico
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Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
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Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
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University of Montenegro, Podgorica, Montenegro
104
University of Auckland, Auckland, New Zealand
105
University of Canterbury, Christchurch, New Zealand
106
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
107
AGH University of Science and Technology Faculty of Computer Science, Electronics and Telecommunications, Kraków, Poland
108
National Centre for Nuclear Research, Swierk, Poland
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Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Warsaw, Poland
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Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon, Portugal
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Joint Institute for Nuclear Research, Dubna, Russia
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Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
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Institute for Nuclear Research, Moscow, Russia
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Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia
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Moscow Institute of Physics and Technology, Moscow, Russia
116
National Research Nuclear University ‘Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia
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P.N. Lebedev Physical Institute, Moscow, Russia
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Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
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Novosibirsk State University (NSU), Novosibirsk, Russia
120
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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University of Belgrade: Faculty of Physics and VINCA Institute of Nuclear Sciences, Belgrade, Serbia
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Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
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Universidad Autónoma de Madrid, Madrid, Spain
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Universidad de Oviedo, Instituto Universitario de Ciencias y Tecnologías Espaciales de Asturias (ICTEA), Oviedo, Spain
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Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
128
University of Colombo, Colombo, Sri Lanka
129
Department of Physics, University of Ruhuna, Matara, Sri Lanka
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CERN, European Organization for Nuclear Research, Geneva, Switzerland
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Paul Scherrer Institut, Villigen, Switzerland
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ETH Zurich-Institute for Particle Physics and Astrophysics (IPA), Zurich, Switzerland
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Universität Zürich, Zurich, Switzerland
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National Central University, Chung-Li, Taiwan
135
National Taiwan University (NTU), Taipei, Taiwan
136
Department of Physics, Faculty of Science, Chulalongkorn University, Bangkok, Thailand
137
Çukurova University, Physics Department, Science and Art Faculty, Adana, Turkey
138
Physics Department, Middle East Technical University, Ankara, Turkey
139
Bogazici University, Istanbul, Turkey
140
Istanbul Technical University, Istanbul, Turkey
141
Istanbul University, Istanbul, Turkey
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Institute for Scintillation Materials of National Academy of Science of Ukraine, Kharkiv, Ukraine
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National Scientific Center, Kharkov Institute of Physics and Technology, Kharkiv, Ukraine
144
University of Bristol, Bristol, UK
145
Rutherford Appleton Laboratory, Didcot, UK
146
Imperial College, London, UK
147
Brunel University, Uxbridge, UK
148
Baylor University, Waco, TX, USA
149
Catholic University of America, Washington, DC, USA
150
The University of Alabama, Tuscaloosa, AL, USA
151
Boston University, Boston, MA, USA
152
Brown University, Providence, RI, USA
153
University of California, Davis, Davis, CA, USA
154
University of California, Los Angeles, CA, USA
155
University of California, Riverside, Riverside, CA, USA
156
University of California, San Diego, La Jolla, CA, USA
157
Department of Physics, University of California, Santa Barbara, Santa Barbara, CA, USA
158
California Institute of Technology, Pasadena, CA, USA
159
Carnegie Mellon University, Pittsburgh, PA, USA
160
University of Colorado Boulder, Boulder, CO, USA
161
Cornell University, Ithaca, NY, USA
162
Fermi National Accelerator Laboratory, Batavia, IL, USA
163
University of Florida, Gainesville, FL, USA
164
Florida State University, Tallahassee, FL, USA
165
Florida Institute of Technology, Melbourne, FL, USA
166
University of Illinois at Chicago (UIC), Chicago, IL, USA
167
The University of Iowa, Iowa City, IA, USA
168
Johns Hopkins University, Baltimore, MD, USA
169
The University of Kansas, Lawrence, KS, USA
170
Kansas State University, Manhattan, KS, USA
171
Lawrence Livermore National Laboratory, Livermore, CA, USA
172
University of Maryland, College Park, MD, USA
173
Massachusetts Institute of Technology, Cambridge, MA, USA
174
University of Minnesota, Minneapolis, MN, USA
175
University of Mississippi, Oxford, MS, USA
176
University of Nebraska-Lincoln, Lincoln, NE, USA
177
State University of New York at Buffalo, Buffalo, NY, USA
178
Northeastern University, Boston, MA, USA
179
Northwestern University, Evanston, IL, USA
180
University of Notre Dame, Notre Dame, IN, USA
181
The Ohio State University, Columbus, OH, USA
182
Princeton University, Princeton, NJ, USA
183
University of Puerto Rico, Mayaguez, PR, USA
184
Purdue University, West Lafayette, IN, USA
185
Purdue University Northwest, Hammond, IN, USA
186
Rice University, Houston, TX, USA
187
University of Rochester, Rochester, NY, USA
188
Rutgers, The State University of New Jersey, Piscataway, NJ, USA
189
University of Tennessee, Knoxville, TN, USA
190
Texas A &M University, College Station, TX, USA
191
Texas Tech University, Lubbock, TX, USA
192
Vanderbilt University, Nashville, TN, USA
193
University of Virginia, Charlottesville, VA, USA
194
Wayne State University, Detroit, MI, USA
195
University of Wisconsin-Madison, Madison, WI, USA
196
TU Wien, Wien, Austria
197
Institute of Basic and Applied Sciences, Faculty of Engineering, Arab Academy for Science, Technology and Maritime Transport, Alexandria, Egypt
198
Université Libre de Bruxelles, Bruxelles, Belgium
199
IRFU, CEA, Université Paris-Saclay, Gif-sur-Yvette, France
200
Universidade Estadual de Campinas, Campinas, Brazil
201
Federal University of Rio Grande do Sul, Porto Alegre, Brazil
202
UFMS, Nova Andradina, Brazil
203
Universidade Federal de Pelotas, Pelotas, Brazil
204
University of Chinese Academy of Sciences, Beijing, China
205
Institute for Theoretical and Experimental Physics named by A.I. Alikhanov of NRC ‘Kurchatov Institute’, Moscow, Russia
206
Joint Institute for Nuclear Research, Dubna, Russia
207
Cairo University, Cairo, Egypt
208
Suez University, Suez, Egypt
209
British University in Egypt, Cairo, Egypt
210
Zewail City of Science and Technology, Zewail, Egypt
211
Fayoum University, El-Fayoum, Egypt
212
Purdue University, West Lafayette, IN, USA
213
Université de Haute Alsace, Mulhouse, France
214
Erzincan Binali Yildirim University, Erzincan, Turkey
215
CERN, European Organization for Nuclear Research, Geneva, Switzerland
216
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
217
University of Hamburg, Hamburg, Germany
218
Isfahan University of Technology, Isfahan, Iran
219
Brandenburg University of Technology, Cottbus, Germany
220
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
221
Institute of Physics, University of Debrecen, Debrecen, Hungary
222
Physics Department, Faculty of Science, Assiut University, Assiut, Egypt
223
MTA-ELTE Lendület CMS Particle and Nuclear Physics Group, Eötvös Loránd University, Budapest, Hungary
224
Institute of Nuclear Research ATOMKI, Debrecen, Hungary
225
IIT Bhubaneswar, Bhubaneswar, India
226
Institute of Physics, Bhubaneswar, India
227
G.H.G. Khalsa College, Punjab, India
228
Shoolini University, Solan, India
229
University of Hyderabad, Hyderabad, India
230
University of Visva-Bharati, Santiniketan, India
231
Indian Institute of Technology (IIT), Mumbai, India
232
Deutsches Elektronen-Synchrotron, Hamburg, Germany
233
Department of Physics, University of Science and Technology of Mazandaran, Behshahr, Iran
234
INFN Sezione di Bari, Università di Bari, Politecnico di Bari, Bari, Italy
235
Italian National Agency for New Technologies, Energy and Sustainable Economic Development, Bologna, Italy
236
Centro Siciliano di Fisica Nucleare e di Struttura Della Materia, Catania, Italy
237
Università di Napoli ’Federico II’, Naples, Italy
238
Riga Technical University, Riga, Latvia
239
Consejo Nacional de Ciencia y Tecnología, Mexico City, Mexico
240
Warsaw University of Technology, Institute of Electronic Systems, Warsaw, Poland
241
Institute for Nuclear Research, Moscow, Russia
242
National Research Nuclear University ’Moscow Engineering Physics Institute’ (MEPhI), Moscow, Russia
243
St. Petersburg Polytechnic University, St. Petersburg, Russia
244
University of Florida, Gainesville, FL, USA
245
Imperial College, London, UK
246
P.N. Lebedev Physical Institute, Moscow, Russia
247
California Institute of Technology, Pasadena, CA, USA
248
Budker Institute of Nuclear Physics, Novosibirsk, Russia
249
Faculty of Physics, University of Belgrade, Belgrade, Serbia
250
Trincomalee Campus, Eastern University, Sri Lanka, Nilaveli, Sri Lanka
251
INFN Sezione di Pavia, Università di Pavia, Pavia, Italy
252
National and Kapodistrian University of Athens, Athens, Greece
253
Universität Zürich, Zurich, Switzerland
254
Stefan Meyer Institute for Subatomic Physics, Vienna, Austria
255
Laboratoire d’Annecy-le-Vieux de Physique des Particules, IN2P3-CNRS, Annecy-le-Vieux, France
256
Şırnak University, Sirnak, Turkey
257
Department of Physics, Tsinghua University, Beijing, China
258
Near East University, Research Center of Experimental Health Science, Nicosia, Turkey
259
Beykent University, Istanbul, Turkey
260
Istanbul Aydin University, Application and Research Center for Advanced Studies, Istanbul, Turkey
261
Mersin University, Mersin, Turkey
262
Piri Reis University, Istanbul, Turkey
263
Adiyaman University, Adiyaman, Turkey
264
Ozyegin University, Istanbul, Turkey
265
Izmir Institute of Technology, Izmir, Turkey
266
Necmettin Erbakan University, Konya, Turkey
267
Bozok Universitetesi Rektörlügü, Yozgat, Turkey
268
Marmara University, Istanbul, Turkey
269
Milli Savunma University, Istanbul, Turkey
270
Kafkas University, Kars, Turkey
271
Istanbul Bilgi University, Istanbul, Turkey
272
Hacettepe University, Ankara, Turkey
273
School of Physics and Astronomy, University of Southampton, Southampton, UK
274
IPPP Durham University, Durham, UK
275
Monash University, Faculty of Science, Clayton, Australia
276
Bethel University, St. Paul, Minneapolis, USA
277
Karamanoğlu Mehmetbey University, Karaman, Turkey
278
Ain Shams University, Cairo, Egypt
279
Bingol University, Bingol, Turkey
280
Georgian Technical University, Tbilisi, Georgia
281
Sinop University, Sinop, Turkey
282
Mimar Sinan University, Istanbul, Istanbul, Turkey
283
Nanjing Normal University Department of Physics, Nanjing, China
284
Texas A &M University at Qatar, Doha, Qatar
285
Kyungpook National University, Daegu, Korea
286
CERN, 1211, Geneva 23, Switzerland
e
cms-publication-committee-chair@cern.ch
Received:
1
December
2021
Accepted:
9
October
2022
Published online:
5
December
2022
Measurements of the associated production of a W boson and a charm (
) quark in proton–proton collisions at a centre-of-mass energy of 8
are reported. The analysis uses a data sample corresponding to a total integrated luminosity of 19.7
collected by the CMS detector at the LHC. The W bosons are identified through their leptonic decays to an electron or a muon, and a neutrino. Charm quark jets are selected using distinctive signatures of charm hadron decays. The product of the cross section and branching fraction 
, where 
or 
, and the cross section ratio 
are measured in a fiducial volume and differentially as functions of the pseudorapidity and of the transverse momentum of the lepton from the W boson decay. The results are compared with theoretical predictions. The impact of these measurements on the determination of the strange quark distribution is assessed.
© CERN for the benefit of the CMS collaboration 2022
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