Multiplicity dependence of the average transverse momentum in pp, p–Pb, and Pb–Pb collisions at the LHC

Abelev, B. and Antičić, Tome and Gotovac, Sven and Mundić, Eugen and Planinić, Mirko and Poljak, Nikola and Simatović, Goran and Šuša, Tatjana and Vicković, Linda and Zyzak, M. (ALICE Collaboration) (2013) Multiplicity dependence of the average transverse momentum in pp, p–Pb, and Pb–Pb collisions at the LHC. Physics Letters B, 727 (4-5). pp. 371-380. ISSN 0370-2693

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Abstract

The average transverse momentum pT versus the charged-particle multiplicity Nch was measured in p–Pb collisions at a collision energy per nucleon–nucleon pair √sNN = 5.02 TeV and in pp collisions at collision energies of √s = 0.9, 2.76, and 7 TeV in the kinematic range 0.15 < pT < 10.0 GeV/c and |η| < 0.3 with the ALICE apparatus at the LHC. These data are compared to results in Pb–Pb collisions at √sNN = 2.76 TeV at similar charged-particle multiplicities. In pp and p–Pb collisions, a strong increase of pT with Nch is observed, which is much stronger than that measured in Pb–Pb collisions. For pp collisions, this could be attributed, within a model of hadronizing strings, to multiple-parton interactions and to a final-state color reconnection mechanism. The data in p–Pb and Pb–Pb collisions cannot be described by an incoherent superposition of nucleon–nucleon collisions and pose a challenge to most of the event generators.

Item Type: Article
Keywords: multiplicity, transverse momentum, pp, p-Pb, Pb-Pb, heavy ion, ALICE
Date: 18 December 2013
Subjects: NATURAL SCIENCES > Physics
Additional Information: © 2013 CERN. Published by Elsevier B.V. All rights reserved. This article is published Open Access at sciencedirect.com. It is distributed under the terms of the Creative Commons Attribution License 3.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited. Received 8 July 2013, Revised 8 October 2013, Accepted 25 October 2013, Available online 29 October 2013.
Divisions: Faculty of Science > Department of Physics
Project code: 119-0982887-1006, 098-0982887-2878
Publisher: Elsevier
Depositing User: Nikola Poljak
Date Deposited: 06 Feb 2015 19:48
Last Modified: 29 May 2016 20:23
URI: http://digre.pmf.unizg.hr/id/eprint/3654

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