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Title: Effects of ρ -meson width on pion distributions in heavy-ion collisions
Authors: Huovinen, Pasi
Lo, Pok Man
Marczenko, Michał
Morita, Kenji
Redlich, Krzysztof
Sasaki, Chihiro
Author's alias: 森田, 健司
Keywords: Nuclear and High Energy Physics
Issue Date: 10-Jun-2017
Publisher: Elsevier BV
Journal title: Physics Letters B
Volume: 769
Start page: 509
End page: 512
Abstract: The influence of the finite width of ρ meson on the pion momentum distribution is studied quantitatively in the framework of the S-matrix approach combined with a blast-wave model to describe particle emissions from an expanding fireball. We find that the proper treatment of resonances which accounts for their production dynamics encoded in data for partial wave scattering amplitudes can substantially modify spectra of daughter particles originating in their two body decays. In particular, it results in an enhancement of the low-pT pions from the decays of ρ mesons which improves the quantitative description of the pion spectra in heavy ion collisions obtained by the ALICE collaboration at the LHC energy.
Rights: © 2017 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY license ( Funded by SCOAP3.
DOI(Published Version): 10.1016/j.physletb.2017.03.060
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