https://doi.org/10.1140/epjc/s10052-014-3053-6
Regular Article - Experimental Physics
Measurement of pseudorapidity distributions of charged particles in proton–proton collisions at √s = 8 TeV by the CMS and TOTEM experiments
1
Yerevan Physics Institute, Yerevan, Armenia
2
Institut für Hochenergiephysik der OeAW, Vienna, Austria
3
National Centre for Particle and High Energy Physics, Minsk, Belarus
4
Universiteit Antwerpen, Antwerp, Belgium
5
Vrije Universiteit Brussel, Brussels, Belgium
6
Université Libre de Bruxelles, Brussels, Belgium
7
Ghent University, Ghent, Belgium
8
Université Catholique de Louvain, Louvain-la-Neuve, Belgium
9
Université de Mons, Mons, Belgium
10
Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, Brazil
11
Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
12
Universidade Estadual Paulista, Universidade Federal do ABC, São Paulo, Brazil
13
Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria
14
University of Sofia, Sofia, Bulgaria
15
Institute of High Energy Physics, Beijing, China
16
State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing, China
17
Universidad de Los Andes, Bogota, Colombia
18
Technical University of Split, Split, Croatia
19
University of Split, Split, Croatia
20
Institute Rudjer Boskovic, Zagreb, Croatia
21
University of Cyprus, Nicosia, Cyprus
22
Charles University, Prague, Czech Republic
23
Academy of Scientific Research and Technology of the Arab Republic of Egypt, Egyptian Network of High Energy Physics, Cairo, Egypt
24
National Institute of Chemical Physics and Biophysics, Tallinn, Estonia
25
Department of Physics, University of Helsinki, Helsinki, Finland
26
Helsinki Institute of Physics, Helsinki, Finland
27
Lappeenranta University of Technology, Lappeenranta, Finland
28
DSM/IRFU, CEA/Saclay, Gif-sur-Yvette, France
29
Laboratoire Leprince-Ringuet, Ecole Polytechnique, IN2P3-CNRS, Palaiseau, France
30
Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, Université de Haute Alsace Mulhouse, CNRS/IN2P3, Strasbourg, France
31
Centre de Calcul de l’Institut National de Physique Nucleaire et de Physique des Particules, CNRS/IN2P3, Villeurbanne, France
32
Institut de Physique Nucléaire de Lyon, Université de Lyon, Université Claude Bernard Lyon 1, CNRS-IN2P3, Villeurbanne, France
33
Institute of High Energy Physics and Informatization, Tbilisi State University, Tbilisi, Georgia
34
RWTH Aachen University, I. Physikalisches Institut, Aachen, Germany
35
RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
36
RWTH Aachen University, III. Physikalisches Institut B, Aachen, Germany
37
Deutsches Elektronen-Synchrotron, Hamburg, Germany
38
University of Hamburg, Hamburg, Germany
39
Institut für Experimentelle Kernphysik, Karlsruhe, Germany
40
Institute of Nuclear and Particle Physics (INPP), NCSR Demokritos, Aghia Paraskevi, Greece
41
University of Athens, Athens, Greece
42
University of Ioánnina, Ioannina, Greece
43
Wigner Research Centre for Physics, Budapest, Hungary
44
Institute of Nuclear Research ATOMKI, Debrecen, Hungary
45
University of Debrecen, Debrecen, Hungary
46
National Institute of Science Education and Research, Bhubaneswar, India
47
Panjab University, Chandigarh, India
48
University of Delhi, Delhi, India
49
Saha Institute of Nuclear Physics, Kolkata, India
50
Bhabha Atomic Research Centre, Mumbai, India
51
Tata Institute of Fundamental Research-EHEP, Mumbai, India
52
Tata Institute of Fundamental Research-HECR, Mumbai, India
53
Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
54
University College Dublin, Dublin, Ireland
55
INFN Sezione di Bari, Università di Bari, Politecnico di Bari, Bari, Italy
56
INFN Sezione di Bologna, Università di Bologna, Bologna, Italy
57
INFN Sezione di Catania, Università di Catania, CSFNSM, Catania, Italy
58
INFN Sezione di Firenze, Università di Firenze, Florence, Italy
59
INFN Laboratori Nazionali di Frascati, Frascati, Italy
60
INFN Sezione di Genova, Università di Genova, Genoa, Italy
61
INFN Sezione di Milano-Bicocca, Università di Milano-Bicocca, Milan, Italy
62
INFN Sezione di Napoli, Università di Napoli ‘Federico II’, Università della Basilicata (Potenza), Università G. Marconi (Roma), Naples, Italy
63
INFN Sezione di Padova, Università di Padova, Università di Trento (Trento), Padua, Italy
64
INFN Sezione di Pavia, Università di Pavia, Pavia, Italy
65
INFN Sezione di Perugia, Università di Perugia, Perugia, Italy
66
INFN Sezione di Pisa, Università di Pisa, Scuola Normale Superiore di Pisa, Pisa, Italy
67
INFN Sezione di Roma, Università di Roma, Rome, Italy
68
INFN Sezione di Torino, Università di Torino, Università del Piemonte Orientale (Novara), Turin, Italy
69
INFN Sezione di Trieste, Università di Trieste, Trieste, Italy
70
Kangwon National University, Chuncheon, Korea
71
Kyungpook National University, Taegu, Korea
72
Institute for Universe and Elementary Particles, Chonnam National University, Kwangju, Korea
73
Korea University, Seoul, Korea
74
University of Seoul, Seoul, Korea
75
Sungkyunkwan University, Suwon, Korea
76
Vilnius University, Vilnius, Lithuania
77
National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, Malaysia
78
Centro de Investigacion y de Estudios Avanzados del IPN, Mexico City, Mexico
79
Universidad Iberoamericana, Mexico City, Mexico
80
Benemerita Universidad Autonoma de Puebla, Puebla, Mexico
81
Universidad Autónoma de San Luis Potosí, San Luis Potosí, Mexico
82
University of Auckland, Auckland, New Zealand
83
University of Canterbury, Christchurch, New Zealand
84
National Centre for Physics, Quaid-I-Azam University, Islamabad, Pakistan
85
National Centre for Nuclear Research, Swierk, Poland
86
Faculty of Physics, Institute of Experimental Physics, University of Warsaw, Warsaw, Poland
87
Laboratório de Instrumentação e Física Experimental de Partículas, Lisbon, Portugal
88
Joint Institute for Nuclear Research, Dubna, Russia
89
Petersburg Nuclear Physics Institute, Gatchina (St. Petersburg), Russia
90
Institute for Nuclear Research, Moscow, Russia
91
Institute for Theoretical and Experimental Physics, Moscow, Russia
92
P.N. Lebedev Physical Institute, Moscow, Russia
93
Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow, Russia
94
State Research Center of Russian Federation, Institute for High Energy Physics, Protvino, Russia
95
Faculty of Physics and Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia
96
Centro de Investigaciones Energéticas Medioambientales y Tecnológicas (CIEMAT), Madrid, Spain
97
Universidad Autónoma de Madrid, Madrid, Spain
98
Universidad de Oviedo, Oviedo, Spain
99
Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander, Spain
100
CERN, European Organization for Nuclear Research, Geneva, Switzerland
101
Paul Scherrer Institut, Villigen, Switzerland
102
Institute for Particle Physics, ETH Zurich, Zurich, Switzerland
103
Universität Zürich, Zurich, Switzerland
104
National Central University, Chung-Li, Taiwan
105
National Taiwan University (NTU), Taipei, Taiwan
106
Chulalongkorn University, Bangkok, Thailand
107
Cukurova University, Adana, Turkey
108
Physics Department, Middle East Technical University, Ankara, Turkey
109
Bogazici University, Istanbul, Turkey
110
Istanbul Technical University, Istanbul, Turkey
111
National Scientific Center, Kharkov Institute of Physics and Technology, Kharkiv, Ukraine
112
University of Bristol, Bristol, UK
113
Rutherford Appleton Laboratory, Didcot, UK
114
Imperial College, London, UK
115
Brunel University, Uxbridge, UK
116
Baylor University, Waco, USA
117
The University of Alabama, Tuscaloosa, USA
118
Boston University, Boston, USA
119
Brown University, Providence, USA
120
University of California, Davis, Davis, USA
121
University of California, Los Angeles, USA
122
University of California, Riverside, Riverside, USA
123
University of California, San Diego, La Jolla, USA
124
University of California, Santa Barbara, Santa Barbara, USA
125
California Institute of Technology, Pasadena, USA
126
Carnegie Mellon University, Pittsburgh, USA
127
University of Colorado at Boulder, Boulder, USA
128
Cornell University, Ithaca, USA
129
Fairfield University, Fairfield, USA
130
Fermi National Accelerator Laboratory, Batavia, USA
131
University of Florida, Gainesville, USA
132
Florida International University, Miami, USA
133
Florida State University, Tallahassee, USA
134
Florida Institute of Technology, Melbourne, USA
135
University of Illinois at Chicago (UIC), Chicago, USA
136
The University of Iowa, Iowa City, USA
137
Johns Hopkins University, Baltimore, USA
138
The University of Kansas, Lawrence, USA
139
Kansas State University, Manhattan, USA
140
Lawrence Livermore National Laboratory, Livermore, USA
141
University of Maryland, College Park, USA
142
Massachusetts Institute of Technology, Cambridge, USA
143
University of Minnesota, Minneapolis, USA
144
University of Mississippi, Oxford, USA
145
University of Nebraska-Lincoln, Lincoln, USA
146
State University of New York at Buffalo, Buffalo, USA
147
Northeastern University, Boston, USA
148
Northwestern University, Evanston, USA
149
University of Notre Dame, Notre Dame, USA
150
The Ohio State University, Columbus, USA
151
Princeton University, Princeton, USA
152
University of Puerto Rico, Mayaguez, USA
153
Purdue University, West Lafayette, USA
154
Purdue University Calumet, Hammond, USA
155
Rice University, Houston, USA
156
University of Rochester, Rochester, USA
157
The Rockefeller University, New York, USA
158
Rutgers, The State University of New Jersey, Piscataway, USA
159
University of Tennessee, Knoxville, USA
160
Texas A&M University, College Station, USA
161
Texas Tech University, Lubbock, USA
162
Vanderbilt University, Nashville, USA
163
University of Virginia, Charlottesville, USA
164
Wayne State University, Detroit, USA
165
University of Wisconsin, Madison, USA
166
CERN, 1211, Geneva 23, Switzerland
167
Institute of Physics of the Academy of Sciences of the Czech Republic, Praha, Czech Republic
168
Czech Technical University, Praha, Czech Republic
169
National Institute of Chemical Physics and Biophysics NICPB, Tallinn, Estonia
170
Helsinki Institute of Physics, Helsinki, Finland
171
Department of Physics, University of Helsinki, Helsinki, Finland
172
MTA Wigner Research Center, RMKI, Budapest, Hungary
173
INFN Sezione di Bari, Bari, Italy
174
Dipartimento Interateneo di Fisica di Bari, Bari, Italy
175
Universitá degli Studi di Genova, Genova, Italy
176
Sezione INFN di Genova, Genova, Italy
177
INFN Sezione di Pisa, Pisa, Italy
178
Universitá degli Studi di Siena and Gruppo Collegato INFN di Siena, Siena, Italy
179
CERN, Geneva, Switzerland
180
Department of Physics, Case Western Reserve University, Cleveland, OH, USA
181
AGH University of Science and Technology, Krakow, Poland
182
University of West Bohemia, Pilsen, Czech Republic
183
Ioffe Physical - Technical Institute of Russian Academy of Sciences, St. Petersburg, Russia
184
SLAC National Accelerator Laboratory, Stanford, CA, USA
185
Penn State University, Department of Physics, University Park, PA, USA
186
INRNE-BAS, Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Sofia, Bulgaria
187
Warsaw University of Technology, Warsaw, Poland
* e-mail: cms-publication-committee-chair@cern.ch
** e-mail: Totem-EB@cern.ch
Received:
4
May
2014
Accepted:
31
August
2014
Published online:
29
October
2014
Pseudorapidity (η) distributions of charged particles produced in proton–proton collisions at a centre-of-mass energy of 8 TeV are measured in the ranges |η| < 2.2and 5.3 < |η| < 6.4 covered by the CMS and TOTEM detectors, respectively. The data correspond to an integrated luminosity of ℒ = 45 µb-1. Measurements are presented for three event categories. The most inclusive category is sensitive to 91–96 % of the total inelastic proton–proton cross section. The other two categories are disjoint subsets of the inclusive sample that are either enhanced or depleted in single diffractive dissociation events. The data are compared to models used to describe high-energy hadronic interactions. None of the models considered provide a consistent description of the measured distributions.
© SIF and Springer-Verlag Berlin Heidelberg, 2014
