https://doi.org/10.1140/epjc/s10052-017-5412-6
Regular Article - Experimental Physics
Charged-particle multiplicity distributions over a wide pseudorapidity range in proton-proton collisions at
0.9, 7, and 8 TeV
1
A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation, Yerevan, Armenia
2
Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
3
Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine
4
Department of Physics, Centre for Astroparticle Physics and Space Science (CAPSS), Bose Institute, Kolkata, India
5
Budker Institute for Nuclear Physics, Novosibirsk, Russia
6
California Polytechnic State University, San Luis Obispo, CA, USA
7
Central China Normal University, Wuhan, China
8
Centre de Calcul de l’IN2P3, Villeurbanne, Lyon, France
9
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN), Havana, Cuba
10
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
11
Centro de Investigación y de Estudios Avanzados (CINVESTAV), Mexico City, Mérida, Mexico
12
Centro Fermi-Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi’, Rome, Italy
13
Chicago State University, Chicago, IL, USA
14
China Institute of Atomic Energy, Beijing, China
15
COMSATS Institute of Information Technology (CIIT), Islamabad, Pakistan
16
Departamento de Física de Partículas and IGFAE, Universidad de Santiago de Compostela, Santiago de Compostela, Spain
17
Department of Physics, Aligarh Muslim University, Aligarh, India
18
Department of Physics, Ohio State University, Columbus, OH, USA
19
Department of Physics, Pusan National University, Pusan, South Korea
20
Department of Physics, Sejong University, Seoul, South Korea
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
Division of Experimental High Energy Physics, University of Lund, Lund, Sweden
35
European Organization for Nuclear Research (CERN), Geneva, Switzerland
36
Excellence Cluster Universe, Technische Universität München, Munich, Germany
37
Faculty of Engineering, Bergen University College, Bergen, Norway
38
Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia
39
Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague, Prague, Czech Republic
40
Faculty of Science, P.J. Šafárik University, Kosice, Slovakia
41
Faculty of Technology, Buskerud and Vestfold University College, Tonsberg, Norway
42
Frankfurt Institute for Advanced Studies, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
43
Gangneung-Wonju National University, Gangneung, South Korea
44
Department of Physics, Gauhati University, Guwahati, India
45
Helmholtz-Institut für Strahlen- und Kernphysik, Rheinische Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
46
Helsinki Institute of Physics (HIP), Helsinki, Finland
47
Hiroshima University, Hiroshima, Japan
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, Laboratori Nazionali di Legnaro, Legnaro, Italy
53
INFN, Sezione di Bari, Bari, Italy
54
INFN, Sezione di Bologna, Bologna, Italy
55
INFN, Sezione di Cagliari, Cagliari, Italy
56
INFN, Sezione di Catania, Catania, Italy
57
INFN, Sezione di Padova, Padua, Italy
58
INFN, Sezione di Roma, Rome, Italy
59
INFN, Sezione di Torino, Turin, Italy
60
INFN, Sezione di Trieste, Trieste, Italy
61
Inha University, Incheon, South Korea
62
Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris-Sud, CNRS-IN2P3, Orsay, France
63
Institute for Nuclear Research, Academy of Sciences, Moscow, Russia
64
Institute for Subatomic Physics of Utrecht University, Utrecht, The Netherlands
65
Institute for Theoretical and Experimental Physics, Moscow, Russia
66
Institute of Experimental Physics, Slovak Academy of Sciences, Kosice, Slovakia
67
Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
68
Institute of Physics, Bhubaneswar, India
69
Institute of Space Science (ISS), Bucharest, Romania
70
Institut für Informatik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
71
Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
72
Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany
73
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico, Mexico
74
Instituto de Física, Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
75
Instituto de Física, Universidad Nacional Autónoma de México, Mexico, Mexico
76
IRFU, CEA, Université Paris-Saclay, Saclay, France
77
iThemba LABS, National Research Foundation, Somerset West, South Africa
78
Joint Institute for Nuclear Research (JINR), Dubna, Russia
79
Konkuk University, Seoul, South Korea
80
Korea Institute of Science and Technology Information, Daejeon, South Korea
81
KTO Karatay University, Konya, Turkey
82
Laboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS-IN2P3, Clermont-Ferrand, France
83
Laboratoire de Physique Subatomique et de Cosmologie, Université Grenoble-Alpes, CNRS-IN2P3, Grenoble, France
84
Lawrence Berkeley National Laboratory, Berkeley, CA, USA
85
Moscow Engineering Physics Institute, Moscow, Russia
86
Nagasaki Institute of Applied Science, Nagasaki, Japan
87
National and Kapodistrian University of Athens, Physics Department, Athens, Greece, Athens, Greece
88
National Centre for Nuclear Studies, Warsaw, Poland
89
National Institute for Physics and Nuclear Engineering, Bucharest, Romania
90
National Institute of Science Education and Research, Bhubaneswar, India
91
National Nuclear Research Center, Baku, Azerbaijan
92
National Research Centre Kurchatov Institute, Moscow, Russia
93
Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
94
Nikhef, Nationaal instituut voor subatomaire fysica, Amsterdam, The Netherlands
95
Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, UK
96
Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech Republic
97
Oak Ridge National Laboratory, Oak Ridge, TN, USA
98
Petersburg Nuclear Physics Institute, Gatchina, Russia
99
Physics Department, Creighton University, Omaha, NE, USA
100
Physics department, Faculty of science, University of Zagreb, Zagreb, Croatia
101
Physics Department, Panjab University, Chandigarh, India
102
Physics Department, University of Cape Town, Cape Town, South Africa
103
Physics Department, University of Jammu, Jammu, India
104
Physics Department, University of Rajasthan, Jaipur, India
105
Physikalisches Institut, Eberhard Karls Universität Tübingen, Tübingen, Germany
106
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
107
Physik Department, Technische Universität München, Munich, Germany
108
Purdue University, West Lafayette, IN, USA
109
Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, Germany
110
Rudjer Bošković Institute, Zagreb, Croatia
111
Russian Federal Nuclear Center (VNIIEF), Sarov, Russia
112
Saha Institute of Nuclear Physics, Kolkata, India
113
School of Physics and Astronomy, University of Birmingham, Birmingham, UK
114
Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru
115
SSC IHEP of NRC Kurchatov institute, Protvino, Russia
116
Stefan Meyer Institut für Subatomare Physik (SMI), Vienna, Austria
117
SUBATECH, IMT Atlantique, Université de Nantes, CNRS-IN2P3, Nantes, France
118
Suranaree University of Technology, Nakhon Ratchasima, Thailand
119
Technical University of Košice, Kosice, Slovakia
120
Technical University of Split FESB, Split, Croatia
121
The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Kraków, Poland
122
Physics Department, The University of Texas at Austin, Austin, TX, USA
123
Universidad Autónoma de Sinaloa, Culiacán, Mexico
124
Universidade de São Paulo (USP), São Paulo, Brazil
125
Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil
126
Universidade Federal do ABC, Santo Andre, Brazil
127
University of Houston, Houston, TX, USA
128
University of Jyväskylä, Jyväskylä, Finland
129
University of Liverpool, Liverpool, UK
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 de Lyon, Université Lyon 1, CNRS/IN2P3, IPN-Lyon, Villeurbanne, Lyon, France
135
Université de Strasbourg, CNRS, IPHC UMR 7178, 67000, Strasbourg, France
136
Università degli Studi di Pavia, Pavia, Italy
137
Università di Brescia, Brescia, Italy
138
V. Fock Institute for Physics, St. Petersburg State University, St. Petersburg, Russia
139
Variable Energy Cyclotron Centre, Kolkata, India
140
Warsaw University of Technology, Warsaw, Poland
141
Wayne State University, Detroit, MI, USA
142
Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary
143
Yale University, New Haven, CT, USA
144
Yonsei University, Seoul, South Korea
145
Zentrum für Technologietransfer und Telekommunikation (ZTT), Fachhochschule Worms, Worms, Germany
146
CERN, 1211, Geneva 23, Switzerland
* e-mail: alice-publications@cern.ch
Received:
7
August
2017
Accepted:
24
November
2017
Published online:
9
December
2017
We present the charged-particle multiplicity distributions over a wide pseudorapidity range () for pp collisions at
, and 8 TeV at the LHC. Results are based on information from the Silicon Pixel Detector and the Forward Multiplicity Detector of ALICE, extending the pseudorapidity coverage of the earlier publications and the high-multiplicity reach. The measurements are compared to results from the CMS experiment and to PYTHIA, PHOJET and EPOS LHC event generators, as well as IP-Glasma calculations.
© CERN for the benefit of the ALICE collaboration, 2017