Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC

ATLAS Collaboration

doi:10.1016/j.physletb.2010.03.064

Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC

ATLAS Collaboration

Department of Physics

University of Freiburg
Bogazici University
Dogus University
Gaziantep University
Istanbul Technical University
University of Oklahoma
Autonomous University of Barcelona
University of Geneva
University of Oxford
Azerbaijan National Academy of Sciences
Oklahoma State University
Michigan State University
Tel Aviv University
Université Paris-Sud
National Institute for Nuclear Physics
University of Milan
Abdus Salam International Centre for Theoretical Physics
University of Bonn
United States Department of Energy
Hampton University
Yale University
Max Planck Institute for Physics (Werner Heisenberg Institute)
University of Calabria
Queen Mary University of London
Rutherford Appleton Laboratory
Brandeis University
University of Granada
Johannes Gutenberg University Mainz
Boston University
Stony Brook University
University of Alberta
University of Texas at Dallas
University of Rome Tor Vergata
CERN
Lund University
The University of Tokyo
RAS - P.N. Lebedev Physics Institute
SUNY Albany
Royal Holloway University of London
University of Victoria BC
L'Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Joint Institute for Nuclear Research
Horia Hulubei National Institute of Physics and Nuclear Engineering
West University of Timisoara
National Technical University of Athens

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185 Scopus citations

Abstract

The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and p_T > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict.

Original language	English
Pages (from-to)	21-42
Number of pages	22
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	688
Issue number	1
DOIs	https://doi.org/10.1016/j.physletb.2010.03.064
State	Published - 26 Apr 2010

Keywords

900 GeV
ATLAS
Charged-particle
LHC
Minimum bias
Multiplicities

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10.1016/j.physletb.2010.03.064

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@article{6b9e77ca22ce4b498e88de07320ea166,

title = "Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC",

abstract = "The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and pT > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15\% higher than the Monte Carlo models predict.",

keywords = "900 GeV, ATLAS, Charged-particle, LHC, Minimum bias, Multiplicities",

author = "\{ATLAS Collaboration\} and G. Aad and E. Abat and B. Abbott and J. Abdallah and Abdelalim, \{A. A.\} and A. Abdesselam and O. Abdinov and B. Abi and M. Abolins and H. Abramowicz and H. Abreu and E. Acerbi and Acharya, \{B. S.\} and M. Ackers and Adams, \{D. L.\} and Addy, \{T. N.\} and J. Adelman and M. Aderholz and C. Adorisio and P. Adragna and T. Adye and S. Aefsky and Aguilar-Saavedra, \{J. A.\} and M. Aharrouche and Ahlen, \{S. P.\} and F. Ahles and A. Ahmad and H. Ahmed and M. Ahsan and G. Aielli and T. Akdogan and {\AA}kesson, \{P. F.\} and {\AA}kesson, \{T. P.A.\} and G. Akimoto and Akimov, \{A. V.\} and A. Aktas and Alam, \{M. S.\} and Alam, \{M. A.\} and J. Albert and S. Albrand and M. Aleksa and Aleksandrov, \{I. N.\} and M. Aleppo and F. Alessandria and C. Alexa and G. Alexander and G. Alexandre and T. Alexopoulos and M. Alhroob and Lee, \{J. S.H.\}",

note = "Publisher Copyright: {\textcopyright} CERN, for the benefit of the ATLAS Collaboration.",

year = "2010",

month = apr,

day = "26",

doi = "10.1016/j.physletb.2010.03.064",

language = "English",

volume = "688",

pages = "21--42",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

publisher = "Elsevier B.V.",

number = "1",

}

TY - JOUR

T1 - Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC

AU - ATLAS Collaboration

AU - Aad, G.

AU - Abat, E.

AU - Abbott, B.

AU - Abdallah, J.

AU - Abdelalim, A. A.

AU - Abdesselam, A.

AU - Abdinov, O.

AU - Abi, B.

AU - Abolins, M.

AU - Abramowicz, H.

AU - Abreu, H.

AU - Acerbi, E.

AU - Acharya, B. S.

AU - Ackers, M.

AU - Adams, D. L.

AU - Addy, T. N.

AU - Adelman, J.

AU - Aderholz, M.

AU - Adorisio, C.

AU - Adragna, P.

AU - Adye, T.

AU - Aefsky, S.

AU - Aguilar-Saavedra, J. A.

AU - Aharrouche, M.

AU - Ahlen, S. P.

AU - Ahles, F.

AU - Ahmad, A.

AU - Ahmed, H.

AU - Ahsan, M.

AU - Aielli, G.

AU - Akdogan, T.

AU - Åkesson, P. F.

AU - Åkesson, T. P.A.

AU - Akimoto, G.

AU - Akimov, A. V.

AU - Aktas, A.

AU - Alam, M. S.

AU - Alam, M. A.

AU - Albert, J.

AU - Albrand, S.

AU - Aleksa, M.

AU - Aleksandrov, I. N.

AU - Aleppo, M.

AU - Alessandria, F.

AU - Alexa, C.

AU - Alexander, G.

AU - Alexandre, G.

AU - Alexopoulos, T.

AU - Alhroob, M.

AU - Lee, J. S.H.

PY - 2010/4/26

Y1 - 2010/4/26

N2 - The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and pT > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict.

AB - The first measurements from proton-proton collisions recorded with the ATLAS detector at the LHC are presented. Data were collected in December 2009 using a minimum-bias trigger during collisions at a centre-of-mass energy of 900 GeV. The charged-particle multiplicity, its dependence on transverse momentum and pseudorapidity, and the relationship between mean transverse momentum and chargedparticle multiplicity are measured for events with at least one charged particle in the kinematic range |η| < 2.5 and pT > 500 MeV. The measurements are compared to Monte Carlo models of proton-proton collisions and to results from other experiments at the same centre-of-mass energy. The charged-particle multiplicity per event and unit of pseudorapidity at η = 0 is measured to be 1.333 ± 0.003(stat.) ± 0.040(syst.), which is 5-15% higher than the Monte Carlo models predict.

KW - 900 GeV

KW - ATLAS

KW - Charged-particle

KW - LHC

KW - Minimum bias

KW - Multiplicities

UR - https://www.scopus.com/pages/publications/84864623625

U2 - 10.1016/j.physletb.2010.03.064

DO - 10.1016/j.physletb.2010.03.064

M3 - Article

AN - SCOPUS:84864623625

SN - 0370-2693

VL - 688

SP - 21

EP - 42

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

Charged-particle multiplicities in pp interactions at √ s = 900 GeV measured with the ATLAS detector at the LHC

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Keywords

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