Disentangling Soft and Hard Hadron Yields in PbPb Collisions at √s_NN = 2.76 ATeV

2014/05/15 by Karoly Urmossy, Károly Ürmössy, Urmossy, Karoly +8
Mathematics · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Quantum Chromodynamics and Particle Interactions #Statistical Methods and Bayesian Inference #hep-ph

paper · pdf · doi:10.48550/arxiv.1405.3963

10 pages, 4 figures, 4 tables

openalex publication_date 2014/05/15 · arxiv created 2014/05/16 · arxiv updated 2014/05/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

We demonstrate that charged pion spectra in central and peripheral PbPb collisions at √(s) = 2.76 ATeV obtained via perturbative quantum chromodynamics improved parton model calculations [17] can be approximated by the Tsallis distribution for transverse momenta p_T ≥ 4 GeV/c. Then, we propose a model in which, hadrons produced in heavy-ion collisions stem either from "soft" or "hard" processes, and are distributed according to the Tsallis distribution in both types of yields. We describe transverse spectra as well as azimuthal anisotropy (v₂) of charged hadrons stemming from various centrality PbPb collisions at √(s) = 2.76 ATeV [40,41,42] analytically. In addition, we find that the anisotropy decreases for more central collisions.

Related

• v₂ of charged hadrons in a`soft + hard' model for PbPb collisions at √ s = 2.76 ATeV
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• Medium effects of charged-hadron production in p+Pb and Pb+Pb collisions at LHC energies using modified Tsallis distribution
• Geometrical scaling of inclusive charged hadron p_{\rm T} spectra in Pb-Pb collsions at 2.76 TeV