Out-Of-Equilibrium Transverse Momentum Spectra of Pions at LHC Energies

02 June 2019

Abstract: In order to characterize the transverse momentum spectra ( pT ) of positive pions measured in the ALICE experiment, two thermal approaches are utilized; one is based on degeneracy of nonperfect Bose-Einstein gas and the other imposes an ad hoc finite pion chemical potential. The inclusion of missing hadron states and the out-of-equilibrium contribute greatly to the excellent characterization of pion production. An excellent reproduction of these pT -spectra is achieved at μπ=0.12 GeV and this covers the entire range of pT . The excellent agreement with the experimental results can be understood as a manifestation of not-yet-regarded anomalous pion production, which likely contributes to the long-standing debate on “anomalous” proton-to-pion ratios at top RHIC and LHC energies.

Published in: Advances in High Energy Physics 2019 (2019) 4604608
Published by: Hindawi
DOI: 10.1155/2019/4604608
License: CC-BY-3.0

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