https://doi.org/10.1140/epjc/s10052-013-2662-9
Regular Article - Experimental Physics
Energy dependence of the transverse momentum distributions of charged particles in pp collisions measured by ALICE
1
CERN, 1211, Geneva 23, Switzerland
2
A.I. Alikhanyan National Science Laboratory (Yerevan Physics Institute) Foundation, Yerevan, Armenia
3
Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
4
Bogolyubov Institute for Theoretical Physics, Kiev, Ukraine
5
Budker Institute for Nuclear Physics, Novosibirsk, Russia
6
California Polytechnic State University, San Luis Obispo, California, United States
7
Central China Normal University, Wuhan, China
8
Centre de Calcul de l’IN2P3, Villeurbanne, 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 and Mérida, Mexico
12
Centro Fermi - Museo Storico della Fisica e Centro Studi e Ricerche “Enrico Fermi”, Rome, Italy
13
Chicago State University, Chicago, United States
14
Commissariat à l’Energie Atomique, IRFU, Saclay, France
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 and Technology, University of Bergen, Bergen, Norway
19
Department of Physics, Ohio State University, Columbus, Ohio, United States
20
Department of Physics, Sejong University, Seoul, South Korea
21
Department of Physics, University of Oslo, Oslo, Norway
22
Dipartimento di Fisica dell’Università and Sezione INFN, Cagliari, Italy
23
Dipartimento di Fisica dell’Università and Sezione INFN, Trieste, Italy
24
Dipartimento di Fisica dell’Università and Sezione INFN, Turin, Italy
25
Dipartimento di Fisica dell’Università ‘La Sapienza’ and Sezione INFN, Rome, Italy
26
Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Bologna, Italy
27
Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Catania, Italy
28
Dipartimento di Fisica e Astronomia dell’Università and Sezione INFN, Padova, Italy
29
Dipartimento di Fisica ‘E.R. Caianiello’ dell’Università and Gruppo Collegato INFN, Salerno, Italy
30
Dipartimento di Scienze e Innovazione Tecnologica dell’Università del Piemonte Orientale and Gruppo Collegato INFN, Alessandria, Italy
31
Dipartimento Interateneo di Fisica ‘M. Merlin’ and Sezione INFN, Bari, Italy
32
Division of Experimental High Energy Physics, University of Lund, Lund, Sweden
33
Eberhard Karls Universität Tübingen, Tübingen, Germany
34
European Organization for Nuclear Research (CERN), Geneva, Switzerland
35
Faculty of Engineering, Bergen University College, Bergen, Norway
36
Faculty of Mathematics, Physics and Informatics, Comenius University, Bratislava, Slovakia
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, South Korea
41
Helsinki Institute of Physics (HIP), Helsinki, Finland
42
Hiroshima University, Hiroshima, Japan
43
Indian Institute of Technology Bombay (IIT), Mumbai, India
44
Indian Institute of Technology Indore (IITI), Indore, India
45
Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris-Sud, CNRS-IN2P3, Orsay, France
46
Institut für Informatik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
47
Institut für Kernphysik, Johann Wolfgang Goethe-Universität Frankfurt, Frankfurt, Germany
48
Institut für Kernphysik, Technische Universität Darmstadt, Darmstadt, Germany
49
Institut für Kernphysik, Westfälische Wilhelms-Universität Münster, Münster, Germany
50
Institut Pluridisciplinaire Hubert Curien (IPHC), Université de Strasbourg, CNRS-IN2P3, Strasbourg, France
51
Institute for High Energy Physics, Protvino, Russia
52
Institute for Nuclear Research, Academy of Sciences, Moscow, Russia
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Institute for Subatomic Physics of Utrecht University, Utrecht, Netherlands
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Institute for Theoretical and Experimental Physics, Moscow, Russia
55
Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
56
Institute of Physics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
57
Institute of Physics, Bhubaneswar, India
58
Institute of Space Science (ISS), Bucharest, Romania
59
Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México, Mexico City, Mexico
60
Instituto de Física, Universidad Nacional Autónoma de México, Mexico City, Mexico
61
iThemba LABS, National Research Foundation, Somerset West, South Africa
62
Joint Institute for Nuclear Research (JINR), Dubna, Russia
63
Korea Institute of Science and Technology Information, Daejeon, South Korea
64
KTO Karatay University, Konya, Turkey
65
Laboratoire de Physique Corpusculaire (LPC), Clermont Université, Université Blaise Pascal, CNRS–IN2P3, Clermont-Ferrand, France
66
Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier, Institut Polytechnique de Grenoble, CNRS-IN2P3, Grenoble, France
67
Laboratori Nazionali di Frascati, INFN, Frascati, Italy
68
Laboratori Nazionali di Legnaro, INFN, Legnaro, Italy
69
Lawrence Berkeley National Laboratory, Berkeley, California, United States
70
Lawrence Livermore National Laboratory, Livermore, California, United States
71
Moscow Engineering Physics Institute, Moscow, Russia
72
National Centre for Nuclear Studies, Warsaw, Poland
73
National Institute for Physics and Nuclear Engineering, Bucharest, Romania
74
National Institute of Science Education and Research, Bhubaneswar, India
75
Niels Bohr Institute, University of Copenhagen, Copenhagen, Denmark
76
Nikhef, National Institute for Subatomic Physics, Amsterdam, Netherlands
77
Nuclear Physics Group, STFC Daresbury Laboratory, Daresbury, United Kingdom
78
Nuclear Physics Institute, Academy of Sciences of the Czech Republic, Řež u Prahy, Czech Republic
79
Oak Ridge National Laboratory, Oak Ridge, Tennessee, United States
80
Petersburg Nuclear Physics Institute, Gatchina, Russia
81
Physics Department, Creighton University, Omaha, Nebraska, United States
82
Physics Department, Panjab University, Chandigarh, India
83
Physics Department, University of Athens, Athens, Greece
84
Physics Department, University of Cape Town, Cape Town, South Africa
85
Physics Department, University of Jammu, Jammu, India
86
Physics Department, University of Rajasthan, Jaipur, India
87
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
88
Politecnico di Torino, Turin, Italy
89
Purdue University, West Lafayette, Indiana, United States
90
Pusan National University, Pusan, South Korea
91
Research Division and ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, Germany
92
Rudjer Bošković Institute, Zagreb, Croatia
93
Russian Federal Nuclear Center (VNIIEF), Sarov, Russia
94
Russian Research Centre Kurchatov Institute, Moscow, Russia
95
Saha Institute of Nuclear Physics, Kolkata, India
96
School of Physics and Astronomy, University of Birmingham, Birmingham, United Kingdom
97
Sección Física, Departamento de Ciencias, Pontificia Universidad Católica del Perú, Lima, Peru
98
Sezione INFN, Bari, Italy
99
Sezione INFN, Bologna, Italy
100
Sezione INFN, Cagliari, Italy
101
Sezione INFN, Catania, Italy
102
Sezione INFN, Padova, Italy
103
Sezione INFN, Rome, Italy
104
Sezione INFN, Trieste, Italy
105
Sezione INFN, Turin, Italy
106
SUBATECH, Ecole des Mines de Nantes, Université de Nantes, CNRS-IN2P3, Nantes, France
107
Technical University of Split FESB, Split, Croatia
108
The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Cracow, Poland
109
Physics Department, The University of Texas at Austin, Austin, TX, United States
110
Universidad Autónoma de Sinaloa, Culiacán, Mexico
111
Universidade de São Paulo (USP), São Paulo, Brazil
112
Universidade Estadual de Campinas (UNICAMP), Campinas, Brazil
113
University of Houston, Houston, Texas, United States
114
University of Jyväskylä, Jyväskylä, Finland
115
University of Tennessee, Knoxville, Tennessee, United States
116
University of Tokyo, Tokyo, Japan
117
University of Tsukuba, Tsukuba, Japan
118
Université de Lyon, Université Lyon 1, IPN-Lyon, CNRS/IN2P3, Villeurbanne, France
119
V. Fock Institute for Physics, St. Petersburg State University, St. Petersburg, Russia
120
Variable Energy Cyclotron Centre, Kolkata, India
121
Vestfold University College, Tonsberg, Norway
122
Warsaw University of Technology, Warsaw, Poland
123
Wayne State University, Detroit, Michigan, United States
124
Wigner Research Centre for Physics, Hungarian Academy of Sciences, Budapest, Hungary
125
Yale University, New Haven, Connecticut, United States
126
Yonsei University, Seoul, South Korea
127
Zentrum für Technologietransfer und Telekommunikation (ZTT), Fachhochschule Worms, Worms, Germany
* e-mail: alice-publications@cern.ch
Received:
9
July
2013
Revised:
5
November
2013
Published online:
6
December
2013
Differential cross sections of charged particles in inelastic pp collisions as a function of p T have been measured at at the LHC. The p T spectra are compared to NLO-pQCD calculations. Though the differential cross section for an individual cannot be described by NLO-pQCD, the relative increase of cross section with is in agreement with NLO-pQCD. Based on these measurements and observations, procedures are discussed to construct pp reference spectra at up to p T=50 GeV/c as required for the calculation of the nuclear modification factor in nucleus–nucleus and proton–nucleus collisions.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013