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arXiv · 1403.4903

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

Paolo Alba·Wanda Alberico·Rene Bellwied·Marcus Bluhm·Valentina Mantovani Sarti·Marlene Nahrgang·Claudia Ratti
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Abstract

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.

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Paolo Alba, Wanda Alberico, Rene Bellwied, Marcus Bluhm, Valentina Mantovani Sarti, Marlene Nahrgang, Claudia Ratti. 2014-07-21. Freeze-out conditions from net-proton and net-charge fluctuations at RHIC. https://doi.org/10.1016/j.physletb.2014.09.052

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