https://doi.org/10.1140/epjc/s10052-019-7389-9
Regular Article - Experimental Physics
Measurement of the inclusive isolated photon production cross section in 
collisions at 
TeV
1
A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation, Yerevan, Armenia
2
Bogolyubov Institute for Theoretical Physics, National Academy of Sciences of Ukraine, Kiev, Ukraine
3
Bose Institute, Department of Physics and Centre for Astroparticle Physics and Space Science (CAPSS), Kolkata, India
4
Budker Institute for Nuclear Physics, Novosibirsk, Russia
5
California Polytechnic State University, San Luis Obispo, CA, USA
6
Central China Normal University, Wuhan, China
7
Centre de Calcul de l’IN2P3, Villeurbanne, Lyon, France
8
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Havana, Cuba
9
Centro de Investigación y de Estudios Avanzados (CINVESTAV), Mexico City, Mérida, Mexico
10
Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi’, Rome, Italy
11
Chicago State University, Chicago, IL, USA
12
China Institute of Atomic Energy, Beijing, China
13
Chonbuk National University, Jeonju, Republic of Korea
14
Comenius University Bratislava, Faculty of Mathematics, Physics and Informatics, Bratislava, Slovakia
15
COMSATS University Islamabad, Islamabad, Pakistan
16
Creighton University, Omaha, NE, USA
17
Department of Physics, Aligarh Muslim University, Aligarh, India
18
Department of Physics, Pusan National University, Pusan, Republic of Korea
19
Department of Physics, Sejong University, Seoul, Republic of Korea
20
Department of Physics, University of California, Berkeley, CA, USA
21
Department of Physics, University of Oslo, Oslo, Norway
22
Department of Physics and Technology, University of Bergen, Bergen, Norway
23
Dipartimento di Fisica dell’Università ’La Sapienza’ and Sezione INFN, Rome, Italy
24
Dipartimento di Fisica dell’Università and Sezione INFN, Cagliari, Italy
25
Dipartimento di Fisica dell’Università and Sezione INFN, Trieste, Italy
26
Dipartimento di Fisica dell’Università and Sezione INFN, Turin, Italy
27
Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Bologna, Italy
28
Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Catania, Italy
29
Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Padua, Italy
30
Dipartimento di Fisica ‘E.R. Caianiello’ dell’Università and Gruppo Collegato INFN, Salerno, Italy
31
Dipartimento DISAT del Politecnico and Sezione INFN, Turin, Italy
32
Dipartimento di Scienze e Innovazione Tecnologica dell’Università del Piemonte Orientale and INFN Sezione di Torino, Alessandria, Italy
33
Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN, Bari, Italy
34
European Organization for Nuclear Research (CERN), Geneva, Switzerland
35
Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture, University of Split, Split, Croatia
36
Faculty of Engineering and Science, Western Norway University of Applied Sciences, Bergen, Norway
37
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
38
Faculty of Science, P.J. Šafárik University, Košice, Slovakia
39
Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
40
Gangneung-Wonju National University, Gangneung, Republic of Korea
41
Gauhati University, Department of Physics, Guwahati, India
42
Helmholtz-Institut für Strahlen- und Kernphysik, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
43
Helsinki Institute of Physics (HIP), Helsinki, Finland
44
High Energy Physics Group, Universidad Autónoma de Puebla, Puebla, Mexico
45
Hiroshima University, Hiroshima, Japan
46
Hochschule Worms, Zentrum für Technologietransfer und Telekommunikation (ZTT), Worms, Germany
47
Horia Hulubei National Institute of Physics and Nuclear Engineering, Bucharest, Romania
48
Indian Institute of Technology Bombay (IIT), Mumbai, India
49
Indian Institute of Technology Indore, Indore, India
50
Indonesian Institute of Sciences, Jakarta, Indonesia
51
INFN, Laboratori Nazionali di Frascati, Frascati, Italy
52
INFN, Sezione di Bari, Bari, Italy
53
INFN, Sezione di Bologna, Bologna, Italy
54
INFN, Sezione di Cagliari, Cagliari, Italy
55
INFN, Sezione di Catania, Catania, Italy
56
INFN, Sezione di Padova, Padua, Italy
57
INFN, Sezione di Roma, Rome, Italy
58
INFN, Sezione di Torino, Turin, Italy
59
INFN, Sezione di Trieste, Trieste, Italy
60
Inha University, Incheon, Republic of Korea
61
Institut de Physique Nucléaire d’Orsay (IPNO), Institut National de Physique Nucléaire et de Physique des Particules (IN2P3/CNRS), Université de Paris-Sud, Université Paris-Saclay, Orsay, France
62
Institute for Nuclear Research, Academy of Sciences, Moscow, Russia
63
Institute for Subatomic Physics, Utrecht University/Nikhef, Utrecht, The Netherlands
64
Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
65
Institute of Physics, Homi Bhabha National Institute, Bhubaneswar, India
66
Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
67
Institute of Space Science (ISS), Bucharest, Romania
68
Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
69
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico
70
Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
71
Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico
72
iThemba LABS, National Research Foundation, Somerset West, South Africa
73
Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik, Fachbereich Informatik und Mathematik, Frankfurt, Germany
74
Joint Institute for Nuclear Research (JINR), Dubna, Russia
75
Korea Institute of Science and Technology Information, Daejeon, Republic of Korea
76
KTO Karatay University, Konya, Turkey
77
Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS-IN2P3, Grenoble, France
78
Lawrence Berkeley National Laboratory, Berkeley, CA, USA
79
Division of Particle Physics, Department of Physics, Lund University, Lund, Sweden
80
Nagasaki Institute of Applied Science, Nagasaki, Japan
81
Nara Women’s University (NWU), Nara, Japan
82
National and Kapodistrian University of Athens, School of Science, Department of Physics, Athens, Greece
83
National Centre for Nuclear Research, Warsaw, Poland
84
National Institute of Science Education and Research, Homi Bhabha National Institute, Jatni, India
85
National Nuclear Research Center, Baku, Azerbaijan
86
National Research Centre Kurchatov Institute, Moscow, Russia
87
Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
88
Nikhef, National institute for subatomic physics, Amsterdam, The Netherlands
89
NRC Kurchatov Institute IHEP, Protvino, Russia
90
NRC « Kurchatov Institut » - ITEP, Moscow, Russia
91
NRNU Moscow Engineering Physics Institute, Moscow, Russia
92
Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, UK
93
Nuclear Physics Institute of the Czech Academy of Sciences, Řež u Prahy, Czech Republic
94
Oak Ridge National Laboratory, Oak Ridge, TN, USA
95
Ohio State University, Columbus, Ohio, USA
96
Petersburg Nuclear Physics Institute, Gatchina, Russia
97
Physics Department, Faculty of science, University of Zagreb, Zagreb, Croatia
98
Physics Department, Panjab University, Chandigarh, India
99
Physics Department, University of Jammu, Jammu, India
100
Physics Department, University of Rajasthan, Jaipur, India
101
Physikalisches Institut, Eberhard-Karls-Universität Tübingen, Tübingen, Germany
102
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
103
Physik Department, Technische Universität München, Munich, Germany
104
Politecnico di Bari, Bari, Italy
105
Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
106
Rudjer Bošković Institute, Zagreb, Croatia
107
Russian Federal Nuclear Center (VNIIEF), Sarov, Russia
108
Saha Institute of Nuclear Physics, Homi Bhabha National Institute, Kolkata, India
109
School of Physics and Astronomy, University of Birmingham, Birmingham, UK
110
Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru
111
Shanghai Institute of Applied Physics, Shanghai, China
112
St. Petersburg State University, St. Petersburg, Russia
113
Stefan Meyer Institut für Subatomare Physik (SMI), Vienna, Austria
114
SUBATECH, IMT Atlantique, Université de Nantes, CNRS-IN2P3, Nantes, France
115
Suranaree University of Technology, Nakhon Ratchasima, Thailand
116
Technical University of Košice, Košice, Slovakia
117
Technische Universität München, Excellence Cluster ’Universe’, Munich, Germany
118
The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
119
The University of Texas at Austin, Austin, TX, USA
120
Universidad Autónoma de Sinaloa, Culiacán, Mexico
121
Universidade de São Paulo (USP), São Paulo, Brazil
122
Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil
123
Universidade Federal do ABC, Santo Andre, Brazil
124
University of Cape Town, Cape Town, South Africa
125
University of Houston, Houston, TX, USA
126
University of Jyväskylä, Jyväskylä, Finland
127
University of Liverpool, Liverpool, UK
128
University of Science and Techonology of China, Hefei, China
129
University of South-Eastern Norway, Tonsberg, Norway
130
University of Tennessee, Knoxville, TN, USA
131
University of the Witwatersrand, Johannesburg, South Africa
132
University of Tokyo, Tokyo, Japan
133
University of Tsukuba, Tsukuba, Japan
134
Université Clermont Auvergne, CNRS/IN2P3, LPC, Clermont-Ferrand, France
135
Université de Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, Villeurbanne, Lyon, France
136
Université de Strasbourg, CNRS, IPHC UMR 7178, F-67000 Strasbourg, France, Strasbourg, France
137
Université Paris-Saclay Centre d’Etudes de Saclay (CEA), IRFU, Départment de Physique Nucléaire (DPhN), Saclay, France
138
Università degli Studi di Foggia, Foggia, Italy
139
Università degli Studi di Pavia, Pavia, Italy
140
Università di Brescia, Brescia, Italy
141
Variable Energy Cyclotron Centre, Homi Bhabha National Institute, Kolkata, India
142
Warsaw University of Technology, Warsaw, Poland
143
Wayne State University, Detroit, MI, USA
144
Westfälische Wilhelms-Universität Münster, Institut für Kernphysik, Münster, Germany
145
Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary
146
Yale University, New Haven, CT, USA
147
Yonsei University, Seoul, Republic of Korea
148
CERN, 1211, Geneva 23, Switzerland
* e-mail: alice-publications@cern.ch
Received:
11
June
2019
Accepted:
11
September
2019
Published online:
7
November
2019
The production cross section of inclusive isolated photons has been measured by the ALICE experiment at the CERN LHC in pp collisions at a centre-of-momentum energy of 
7 TeV. The measurement is performed with the electromagnetic calorimeter EMCal and the central tracking detectors, covering a range of 
in pseudorapidity and a transverse momentum range of 
. The result extends the 
coverage of previously published results of the ATLAS and CMS experiments at the same collision energy to smaller . The measurement is compared to next-to-leading order perturbative QCD calculations and to the results from the ATLAS and CMS experiments. All measurements and theory predictions are in agreement with each other.
© CERN for the benefit of the ALICE collaboration, 2019
