The average transverse momentum (p(T)) versus the charged-particle multiplicity N-ch was measured in p-Pb collisions at a collision energy per nucleon-nucleon √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 < p(T) < 10.0 GeV/c and |eta| < 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 (p(T)) with N-ch 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.

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

LEA, RAMONA;RUI, RINALDO;
2013-01-01

Abstract

The average transverse momentum (p(T)) versus the charged-particle multiplicity N-ch was measured in p-Pb collisions at a collision energy per nucleon-nucleon √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 < p(T) < 10.0 GeV/c and |eta| < 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 (p(T)) with N-ch 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.
2013
Esperti anonimi
Inglese
ELETTRONICO
727
371
380
10
PROTON-PROTON COLLISIONS; CHARGED-PARTICLES; 7 TEV; ANGULAR-CORRELATIONS; LONG-RANGE
http://www.sciencedirect.com/science/article/pii/S0370269313008617#
1050
info:eu-repo/semantics/article
262
B., Abelevbt; J., Adamal; D., Adamováca; A. M., Adaredz; M. M., Aggarwalce; G., Aglieri Rinellaah; M., Agnellocv; Ck, ; A. G., Agocsdy; A., Agostinell...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/537527
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