A ’soft+hard’ model for Pion, Kaon, and Proton Spectra and v2 measured in PbPb Collisions at √s = 2.76ATeV

Barnaföldi, Gergely Gábor and Ürmössy, Károly and Bíró, Gábor (2015) A ’soft+hard’ model for Pion, Kaon, and Proton Spectra and v2 measured in PbPb Collisions at √s = 2.76ATeV. JOURNAL OF PHYSICS-CONFERENCE SERIES, 612 (1). ISSN 1742-6588

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Abstract

Abstract. Hadron spectra measured in high-energy collisions present distributions which can be derived from the non-extensive statistical and thermodynamical phenomena. Based on earlier theoretical developments, it seems, the methods are very applicable for jets hadronization processes in electron-positron, proton-proton, and even in heavy-ion collisions. Here, we present what can was learnt from the recent theoretical and phenomenological developments: transverse momentum spectra and azimuthal anisotropy (v2) of charge averaged pions, kaons and protons stemming from central Pb+Pb collisions at √s = 2.76 ATeV are described analytically in a ‘soft + hard’ model. In this model, we propose that hadron yields produced in heavy-ion collisions are simply the sum of yields stemming from jets (hard yields) in addition to the yields originating from the Quark-Gluon Plasma (soft yields). The hadron spectra in both types of yields are approximated by the Tsallis – Pareto like distribution.

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