Abstract
The transverse momentum and pseudorapidity distributions of charged particles produced in Pb-Pb collisions with different centrality intervals at center-of-mass energy per nucleon pairsNN=2.76 TeV have been analyzed by using the improved multisource thermal model in which the whole interacting system and then the sources are described by the Tsallis statistics. The modelling results are in agreement with experimental data of the ALICE Collaboration. The rapidity distributions of charged particles are obtained according to the extracted parameter values. The shapes of interacting events (the dispersion plots of charged particles) are given in the momentum, rapidity, velocity, and coordinate spaces. Meanwhile, the event shapes in different spaces consisted by different transverse quantities and longitudinal quantities are presented.
Highlights
Because the Relativistic Heavy Ion Collider (RHIC) run successfully in 2000, the studies of high energy heavy ion collisions have been arriving in the collider era since
To extract more information from the pseudorapidity distributions, we present the event shapes from 1000 charged particles in Pb-Pb collisions in different centrality intervals at √sNN = 2.76 TeV in some spaces consisted by different transverse quantities and different longitudinal quantities
(a) The transverse momentum distributions of charged particles produced in Pb-Pb collisions with centrality intervals from 0–5% to 80–90% at √sNN = 2.76 TeV have been analyzed by using the improved multisource thermal model in which the whole interacting system and the sources are described by the Tsallis statistics [14,15,16,17,18,19,20,21]
Summary
Because the Relativistic Heavy Ion Collider (RHIC) run successfully in 2000, the studies of high energy heavy ion collisions have been arriving in the collider era since . Many experiments do measure distributions and correlations of multiplicities, pseudorapidities (rapidities), transverse momentums, azimuths, and others due to that they are the “first day” measurement quantities on charged particles These “first day” measurement quantities are studied in different centrality intervals (impacting parameters), sizes of interacting systems, center-of-mass energies, and other available dependent quantities. We analyze the ALICE data on transverse momentum and pseudorapidity distributions of charged particles produced in Pb-Pb collisions at √sNN = 2.76 TeV [8, 9] by using the improved multisource thermal model [11,12,13] in which the Boltzmann distribution is replaced by the Tsallis statistics [14,15,16,17,18,19,20,21]. The dispersion plots of charged particles, that is, the shapes of interacting events, are given in different spaces
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