Freeze-out conditions from net-proton and net-charge fluctuations at RHIC

We calculate ratios of higher-order susceptibilities quantifying fluctuations in the number of net-protons and in the net-electric charge using the Hadron Resonance Gas (HRG) model. We take into account the effect of resonance decays, the kinematic acceptance cuts in rapidity, pseudo-rapidity and tr...

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Bibliographic Details
Published in:Physics letters. B 2014-11, Vol.738 (C), p.305-310
Main Authors: Alba, Paolo, Alberico, Wanda, Bellwied, Rene, Bluhm, Marcus, Mantovani Sarti, Valentina, Nahrgang, Marlene, Ratti, Claudia
Format: Article
Language:English
Subjects:
PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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Summary:We calculate ratios of higher-order susceptibilities quantifying fluctuations in the number of net-protons and in the net-electric charge using the Hadron Resonance Gas (HRG) model. We take into account the effect of resonance decays, the kinematic acceptance cuts in rapidity, pseudo-rapidity and transverse momentum used in the experimental analysis, as well as a randomization of the isospin of nucleons in the hadronic phase. By comparing these results to the latest experimental data from the STAR Collaboration, we determine the freeze-out conditions from net-electric charge and net-proton distributions and discuss their consistency.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2014.09.052