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arxiv: 1403.4903 · v2 · pith:IPSD66OMnew · submitted 2014-03-19 · ✦ hep-ph · nucl-th

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 This is my paper
classification ✦ hep-ph nucl-th
keywords chargeconditionsexperimentalfluctuationsfreeze-outnet-electricnet-protonresonance
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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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