https://doi.org/10.1140/epjc/s10052-018-6219-9
Regular Article - Experimental Physics
Prompt and non-prompt 
and 
suppression at high transverse momentum in 
Pb+Pb collisions with the ATLAS experiment
1
Department of Physics, University of Adelaide, Adelaide, Australia
2
Physics Department, SUNY Albany, Albany, NY, USA
3
Department of Physics, University of Alberta, Edmonton, AB, Canada
4
Department of Physics, Ankara University, Ankara, Turkey
5
Istanbul Aydin University, Istanbul, Turkey
6
Division of Physics, TOBB University of Economics and Technology, Ankara, Turkey
7
LAPP, Université Grenoble Alpes, Université Savoie Mont Blanc, CNRS/IN2P3, Annecy, France
8
High Energy Physics Division, Argonne National Laboratory, Argonne, IL, USA
9
Department of Physics, University of Arizona, Tucson, AZ, USA
10
Department of Physics, University of Texas at Arlington, Arlington, TX, USA
11
Physics Department, National and Kapodistrian University of Athens, Athens, Greece
12
Physics Department, National Technical University of Athens, Zografou, Greece
13
Department of Physics, University of Texas at Austin, Austin, TX, USA
14
Bahcesehir University, Faculty of Engineering and Natural Sciences, Istanbul, Turkey
15
Istanbul Bilgi University, Faculty of Engineering and Natural Sciences, Istanbul, Turkey
16
Department of Physics, Bogazici University, Istanbul, Turkey
17
Department of Physics Engineering, Gaziantep University, Gaziantep, Turkey
18
Institute of Physics, Azerbaijan Academy of Sciences, Baku, Azerbaijan
19
Institut de Física d’Altes Energies (IFAE), Barcelona Institute of Science and Technology, Barcelona, Spain
20
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing, China
21
Physics Department, Tsinghua University, Beijing, China
22
Department of Physics, Nanjing University, Nanjing, China
23
University of Chinese Academy of Science (UCAS), Beijing, China
24
Institute of Physics, University of Belgrade, Belgrade, Serbia
25
Department for Physics and Technology, University of Bergen, Bergen, Norway
26
Physics Division, Lawrence Berkeley National Laboratory and University of California, Berkeley, CA, USA
27
Institut für Physik, Humboldt Universität zu Berlin, Berlin, Germany
28
Albert Einstein Center for Fundamental Physics and Laboratory for High Energy Physics, University of Bern, Bern, Switzerland
29
School of Physics and Astronomy, University of Birmingham, Birmingham, UK
30
Centro de Investigaciónes, Universidad Antonio Nariño, Bogota, Colombia
31
Dipartimento di Fisica e Astronomia, Università di Bologna, Bologna, Italy
32
INFN Sezione di Bologna, Bologna, Italy
33
Physikalisches Institut, Universität Bonn, Bonn, Germany
34
Department of Physics, Boston University, Boston, MA, USA
35
Department of Physics, Brandeis University, Waltham, MA, USA
36
Transilvania University of Brasov, Brasov, Romania
37
Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
38
Department of Physics, Alexandru Ioan Cuza University of Iasi, Iasi, Romania
39
National Institute for Research and Development of Isotopic and Molecular Technologies, Physics Department, Cluj-Napoca, Romania
40
University Politehnica Bucharest, Bucharest, Romania
41
West University in Timisoara, Timisoara, Romania
42
Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia
43
Department of Subnuclear Physics, Institute of Experimental Physics of the Slovak Academy of Sciences, Kosice, Slovak Republic
44
Physics Department, Brookhaven National Laboratory, Upton, NY, USA
45
Departamento de Física, Universidad de Buenos Aires, Buenos Aires, Argentina
46
Cavendish Laboratory, University of Cambridge, Cambridge, UK
47
Department of Physics, University of Cape Town, Cape Town, South Africa
48
Department of Mechanical Engineering Science, University of Johannesburg, Johannesburg, South Africa
49
School of Physics, University of the Witwatersrand, Johannesburg, South Africa
50
Department of Physics, Carleton University, Ottawa, ON, Canada
51
Faculté des Sciences Ain Chock, Réseau Universitaire de Physique des Hautes Energies, Université Hassan II, Casablanca, Morocco
52
Centre National de l’Energie des Sciences Techniques Nucleaires (CNESTEN), Rabat, Morocco
53
Faculté des Sciences Semlalia, Université Cadi Ayyad, LPHEA-Marrakech, Marrakesh, Morocco
54
Faculté des Sciences, Université Mohamed Premier and LPTPM, Oujda, Morocco
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Faculté des sciences, Université Mohammed V, Rabat, Morocco
56
CERN, Geneva, Switzerland
57
Enrico Fermi Institute, University of Chicago, Chicago, IL, USA
58
LPC, Université Clermont Auvergne, CNRS/IN2P3, Clermont-Ferrand, France
59
Nevis Laboratory, Columbia University, Irvington, NY, USA
60
Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
61
Dipartimento di Fisica, Università della Calabria, Rende, Italy
62
INFN Gruppo Collegato di Cosenza, Laboratori Nazionali di Frascati, Frascati, Italy
63
Physics Department, Southern Methodist University, Dallas, TX, United States of America
64
Physics Department, University of Texas at Dallas, Richardson, TX, United States of America
65
Department of Physics, Stockholm University, Stockholm, Sweden
66
Oskar Klein Centre, Stockholm, Sweden
67
Deutsches Elektronen-Synchrotron DESY, Hamburg and Zeuthen, Zeuthen, Germany
68
Lehrstuhl für Experimentelle Physik IV, Technische Universität Dortmund, Dortmund, Germany
69
Institut für Kern- und Teilchenphysik, Technische Universität Dresden, Dresden, Germany
70
Department of Physics, Duke University, Durham, NC, United States of America
71
SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh, UK
72
INFN e Laboratori Nazionali di Frascati, Frascati, Italy
73
Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Freiburg, Germany
74
II Physikalisches Institut, Georg-August-Universität Göttingen, Göttingen, Germany
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Département de Physique Nucléaire et Corpusculaire, Université de Genève, Genève, Switzerland
76
Dipartimento di Fisica, Università di Genova, Genoa, Italy
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INFN Sezione di Genova, Genoa, Italy
78
II. Physikalisches Institut, Justus-Liebig-Universität Giessen, Giessen, Germany
79
SUPA, School of Physics and Astronomy, University of Glasgow, Glasgow, UK
80
LPSC, Université Grenoble Alpes, CNRS/IN2P3, Grenoble INP, Grenoble, France
81
Laboratory for Particle Physics and Cosmology, Harvard University, Cambridge, MA, United States of America
82
Department of Modern Physics and State Key Laboratory of Particle Detection and Electronics, University of Science and Technology of China, Hefei, China
83
Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation (MOE), Shandong University, Qingdao, China
84
School of Physics and Astronomy, Shanghai Jiao Tong University, KLPPAC-MoE, SKLPPC, Shanghai, China
85
Tsung-Dao Lee Institute, Shanghai, China
86
Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
87
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
88
Faculty of Applied Information Science, Hiroshima Institute of Technology, Hiroshima, Japan
89
Department of Physics, Chinese University of Hong Kong, Shatin, NT, Hong Kong
90
Department of Physics, University of Hong Kong, Hong Kong, Hong Kong
91
Department of Physics and Institute for Advanced Study, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
92
Department of Physics, National Tsing Hua University, Hsinchu, Taiwan
93
Department of Physics, Indiana University, Bloomington, IN, USA
94
INFN Gruppo Collegato di Udine, Sezione di Trieste, Udine, Italy
95
ICTP, Trieste, Italy
96
Dipartimento di Chimica, Fisica e Ambiente, Università di Udine, Udine, Italy
97
INFN Sezione di Lecce, Lecce, Italy
98
Dipartimento di Matematica e Fisica, Università del Salento, Lecce, Italy
99
INFN Sezione di Milano, Milan, Italy
100
Dipartimento di Fisica, Università di Milano, Milan, Italy
101
INFN Sezione di Napoli, Naples, Italy
102
Dipartimento di Fisica, Università di Napoli, Naples, Italy
103
INFN Sezione di Pavia, Pavia, Italy
104
Dipartimento di Fisica, Università di Pavia, Pavia, Italy
105
INFN Sezione di Pisa, Pisa, Italy
106
Dipartimento di Fisica E. Fermi, Università di Pisa, Pisa, Italy
107
INFN Sezione di Roma, Rome, Italy
108
Dipartimento di Fisica, Sapienza Università di Roma, Rome, Italy
109
INFN Sezione di Roma Tor Vergata, Rome, Italy
110
Dipartimento di Fisica, Università di Roma Tor Vergata, Rome, Italy
111
INFN Sezione di Roma Tre, Rome, Italy
112
Dipartimento di Matematica e Fisica, Università Roma Tre, Rome, Italy
113
INFN-TIFPA, Povo, Italy
114
Università degli Studi di Trento, Trento, Italy
115
Institut für Astro- und Teilchenphysik, Leopold-Franzens-Universität, Innsbruck, Austria
116
University of Iowa, Iowa City, IA, USA
117
Department of Physics and Astronomy, Iowa State University, Ames, IA, USA
118
Joint Institute for Nuclear Research, Dubna, Russia
119
Departamento de Engenharia Elétrica, Universidade Federal de Juiz de Fora (UFJF), Juiz de Fora, Brazil
120
Universidade Federal do Rio De Janeiro COPPE/EE/IF, Rio de Janeiro, Brazil
121
Universidade Federal de São João del Rei (UFSJ), São João del Rei, Brazil
122
Instituto de Física, Universidade de São Paulo, São Paulo, Brazil
123
KEK, High Energy Accelerator Research Organization, Tsukuba, Japan
124
Graduate School of Science, Kobe University, Kobe, Japan
125
Faculty of Physics and Applied Computer Science, AGH University of Science and Technology, Kraków, Poland
126
Marian Smoluchowski Institute of Physics, Jagiellonian University, Kraków, Poland
127
Institute of Nuclear Physics Polish Academy of Sciences, Kraków, Poland
128
Faculty of Science, Kyoto University, Kyoto, Japan
129
Kyoto University of Education, Kyoto, Japan
130
Research Center for Advanced Particle Physics and Department of Physics, Kyushu University, Fukuoka, Japan
131
Instituto de Física La Plata, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
132
Physics Department, Lancaster University, Lancaster, UK
133
Oliver Lodge Laboratory, University of Liverpool, Liverpool, UK
134
Department of Experimental Particle Physics, Jožef Stefan Institute and Department of Physics, University of Ljubljana, Ljubljana, Slovenia
135
School of Physics and Astronomy, Queen Mary University of London, London, UK
136
Department of Physics, Royal Holloway University of London, Egham, UK
137
Department of Physics and Astronomy, University College London, London, UK
138
Louisiana Tech University, Ruston, LA, USA
139
Fysiska institutionen, Lunds universitet, Lund, Sweden
140
Centre de Calcul de l’Institut National de Physique Nucléaire et de Physique des Particules (IN2P3), Villeurbanne, France
141
Departamento de Física Teorica C-15 and CIAFF, Universidad Autónoma de Madrid, Madrid, Spain
142
Institut für Physik, Universität Mainz, Mainz, Germany
143
School of Physics and Astronomy, University of Manchester, Manchester, UK
144
CPPM, Aix-Marseille Université, CNRS/IN2P3, Marseille, France
145
Department of Physics, University of Massachusetts, Amherst, MA, USA
146
Department of Physics, McGill University, Montreal, QC, Canada
147
School of Physics, University of Melbourne, Victoria, Australia
148
Department of Physics, University of Michigan, Ann Arbor, MI, USA
149
Department of Physics and Astronomy, Michigan State University, East Lansing, MI, USA
150
B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Minsk, Belarus
151
Research Institute for Nuclear Problems of Byelorussian State University, Minsk, Belarus
152
Group of Particle Physics, University of Montreal, Montreal, QC, Canada
153
P.N. Lebedev Physical Institute of the Russian Academy of Sciences, Moscow, Russia
154
Institute for Theoretical and Experimental Physics (ITEP), Moscow, Russia
155
National Research Nuclear University MEPhI, Moscow, Russia
156
D.V. Skobeltsyn Institute of Nuclear Physics, M.V. Lomonosov Moscow State University, Moscow, Russia
157
Fakultät für Physik, Ludwig-Maximilians-Universität München, Munich, Germany
158
Max-Planck-Institut für Physik (Werner-Heisenberg-Institut), Munich, Germany
159
Nagasaki Institute of Applied Science, Nagasaki, Japan
160
Graduate School of Science and Kobayashi-Maskawa Institute, Nagoya University, Nagoya, Japan
161
Department of Physics and Astronomy, University of New Mexico, Albuquerque, NM, USA
162
Institute for Mathematics, Astrophysics and Particle Physics, Radboud University Nijmegen/Nikhef, Nijmegen, The Netherlands
163
Nikhef National Institute for Subatomic Physics, University of Amsterdam, Amsterdam, The Netherlands
164
Department of Physics, Northern Illinois University, DeKalb, IL, USA
165
Budker Institute of Nuclear Physics, SB RAS, Novosibirsk, Russia
166
Novosibirsk State University, Novosibirsk, Russia
167
Department of Physics, New York University, New York, NY, USA
168
Ohio State University, Columbus, OH, USA
169
Faculty of Science, Okayama University, Okayama, Japan
170
Homer L. Dodge Department of Physics and Astronomy, University of Oklahoma, Norman, OK, USA
171
Department of Physics, Oklahoma State University, Stillwater, OK, USA
172
Palacký University, RCPTM, Joint Laboratory of Optics, Olomouc, Czech Republic
173
Center for High Energy Physics, University of Oregon, Eugene, OR, USA
174
LAL, Université Paris-Sud, CNRS/IN2P3, Université Paris-Saclay, Orsay, France
175
Graduate School of Science, Osaka University, Osaka, Japan
176
Department of Physics, University of Oslo, Oslo, Norway
177
Department of Physics, Oxford University, Oxford, UK
178
LPNHE, Sorbonne Université, Paris Diderot Sorbonne Paris Cité, CNRS/IN2P3, Paris, France
179
Department of Physics, University of Pennsylvania, Philadelphia, PA, USA
180
Konstantinov Nuclear Physics Institute of National Research Centre “Kurchatov Institute”, PNPI, St. Petersburg, Russia
181
Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, USA
182
Laboratório de Instrumentação e Física Experimental de Partículas-LIP, Lisbon, Portugal
183
Departamento de Física, Faculdade de Ciências, Universidade de Lisboa, Lisbon, Portugal
184
Departamento de Física, Universidade de Coimbra, Coimbra, Portugal
185
Centro de Física Nuclear da Universidade de Lisboa, Lisboa, Portugal
186
Departamento de Física, Universidade do Minho, Braga, Portugal
187
Departamento de Física Teorica y del Cosmos, Universidad de Granada, Granada, Spain
188
Dep Física and CEFITEC of Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Caparica, Portugal
189
Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
190
Czech Technical University in Prague, Prague, Czech Republic
191
Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic
192
State Research Center Institute for High Energy Physics, NRC KI, Protvino, Russia
193
Particle Physics Department, Rutherford Appleton Laboratory, Didcot, UK
194
IRFU, CEA , Université Paris-Saclay, Gif-sur-Yvette, France
195
Santa Cruz Institute for Particle Physics, University of California Santa Cruz, Santa Cruz, CA, USA
196
Departamento de Física, Pontificia Universidad Católica de Chile, Santiago, Chile
197
Departamento de Física, Universidad Técnica Federico Santa María, Valparaíso, Chile
198
Department of Physics, University of Washington, Seattle, WA, USA
199
Department of Physics and Astronomy, University of Sheffield, Sheffield, UK
200
Department of Physics, Shinshu University, Nagano, Japan
201
Department Physik, Universität Siegen, Siegen, Germany
202
Department of Physics, Simon Fraser University, Burnaby, BC, Canada
203
SLAC National Accelerator Laboratory, Stanford, CA, USA
204
Physics Department, Royal Institute of Technology, Stockholm, Sweden
205
Departments of Physics and Astronomy, Stony Brook University, Stony Brook, NY, USA
206
Department of Physics and Astronomy, University of Sussex, Brighton, UK
207
School of Physics, University of Sydney, Sydney, Australia
208
Institute of Physics, Academia Sinica, Taipei, Taiwan
209
Academia Sinica Grid Computing, Institute of Physics, Academia Sinica, Taipei, Taiwan
210
E. Andronikashvili Institute of Physics, Iv. Javakhishvili Tbilisi State University, Tbilisi, Georgia
211
High Energy Physics Institute, Tbilisi State University, Tbilisi, Georgia
212
Department of Physics, Technion: Israel Institute of Technology, Haifa, Israel
213
Raymond and Beverly Sackler School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel
214
Department of Physics, Aristotle University of Thessaloniki, Thessaloniki, Greece
215
International Center for Elementary Particle Physics and Department of Physics, University of Tokyo, Tokyo, Japan
216
Graduate School of Science and Technology, Tokyo Metropolitan University, Tokyo, Japan
217
Department of Physics, Tokyo Institute of Technology, Tokyo, Japan
218
Tomsk State University, Tomsk, Russia
219
Department of Physics, University of Toronto, Toronto, ON, Canada
220
TRIUMF, Vancouver, BC, Canada
221
Department of Physics and Astronomy, York University, Toronto, ON, Canada
222
Division of Physics and Tomonaga Center for the History of the Universe, Faculty of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
223
Department of Physics and Astronomy, Tufts University, Medford, MA, USA
224
Department of Physics and Astronomy, University of California Irvine, Irvine, CA, USA
225
Department of Physics and Astronomy, University of Uppsala, Uppsala, Sweden
226
Department of Physics, University of Illinois, Urbana, IL, USA
227
Instituto de Física Corpuscular (IFIC), Centro Mixto Universidad de Valencia - CSIC, Valencia, Spain
228
Department of Physics, University of British Columbia, Vancouver, BC, Canada
229
Department of Physics and Astronomy, University of Victoria, Victoria, BC, Canada
230
Fakultät für Physik und Astronomie, Julius-Maximilians-Universität Würzburg, Würzburg, Germany
231
Department of Physics, University of Warwick, Coventry, UK
232
Waseda University, Tokyo, Japan
233
Department of Particle Physics, Weizmann Institute of Science, Rehovot, Israel
234
Department of Physics, University of Wisconsin, Madison, WI, USA
235
Fakultät für Mathematik und Naturwissenschaften, Fachgruppe Physik, Bergische Universität Wuppertal, Wuppertal, Germany
236
Department of Physics, Yale University, New Haven, CT, USA
237
Yerevan Physics Institute, Yerevan, Armenia
238
CERN, 1211, Geneva 23, Switzerland
* e-mail: atlas.publications@cern.ch
Received:
11
May
2018
Accepted:
4
September
2018
Published online:
21
September
2018
A measurement of and production is presented. It is based on a data sample from Pb+Pb collisions at 
and pp collisions at 
recorded by the ATLAS detector at the LHC in 2015, corresponding to an integrated luminosity of 
and 
in Pb+Pb and pp, respectively. The measurements of per-event yields, nuclear modification factors, and non-prompt fractions are performed in the dimuon decay channel for 
GeV in dimuon transverse momentum, and 
in rapidity. Strong suppression is found in Pb+Pb collisions for both prompt and non-prompt , increasing with event centrality. The suppression of prompt is observed to be stronger than that of , while the suppression of non-prompt is equal to that of the non-prompt within uncertainties, consistent with the expectation that both arise from b-quarks propagating through the medium. Despite prompt and non-prompt arising from different mechanisms, the dependence of their nuclear modification factors on centrality is found to be quite similar.
© CERN for the benefit of the ATLAS collaboration, 2018
