Net-proton probability distribution in heavy ion collisions

Abstract

We compute net-proton probability distributions in heavy ion collisions within the hadron resonance gas model. The model results are compared with data taken by the STAR Collaboration in Au-Au collisions at sqrt(s_{NN})= 200 GeV for different centralities. We show that in peripheral Au-Au collisions the measured distributions, and the resulting first four moments of net-proton fluctuations, are consistent with results obtained from the hadron resonance gas model. However, data taken in central Au-Au collisions differ from the predictions of the model. The observed deviations can not be attributed to uncertainties in model parameters. We discuss possible interpretations of the observed deviations.

4 pages, 2 figures

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Cited by in corpus (44)

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• Freeze-out Conditions in Heavy Ion Collisions from QCD Thermodynamics
• Baryon number conservation and the cumulants of the net proton distribution
• Relation between baryon number fluctuations and experimentally observed proton number fluctuations in relativistic heavy ion collisions
• Volume fluctuations and higher order cumulants of the net baryon number
• Conserved number fluctuations in a hadron resonance gas model
• Fluctuations of conserved charges in relativistic heavy ion collisions: An introduction
• Relativistic nuclear collisions: Establishing a non-critical baseline for fluctuation measurements
• Unified Description of Efficiency Correction and Error Estimation for Moments of Conserved Quantities in Heavy-Ion Collisions
• Thermodynamics and fluctuations of conserved charges in Hadron Resonance Gas model in finite volume
• Multiplicity dependence of (multi-)strange baryons in the canonical ensemble with phase shift corrections
• Effects of kinematic cuts on net-electric charge fluctuations
• Net-charge probability distributions in heavy ion collisions at chemical freeze-out
• Net quark number probability distribution near the chiral crossover transition
• Lee-Yang zero distribution of high temperature QCD and Roberge-Weiss phase transition
• Criticality of the net-baryon number probability distribution at finite density
• Effects of Nuclear Potential on the Cumulants of Net-Proton and Net-Baryon Multiplicity Distributions in Au+Au Collisions at $\sqrt{s_{\text{NN}}}=5\text{GeV}$
• Proton Cumulants and Correlation Functions in Au + Au Collisions at $\sqrt{s_{\mathrm{NN}}}$=7.7-200 GeV from UrQMD Model
• Probing QCD Phase Structure by Baryon Multiplicity Distribution
• Conserved charge fluctuations are not conserved during the hadronic phase
• Effects of volume corrections and resonance decays on cumulants of net-charge distributions in a Monte Carlo hadron resonance gas model
• Cumulants of multiplicity distributions in most-central heavy-ion collisions
• Fourier coefficients of the net-baryon number density and chiral criticality
• Generalized quark number susceptibilities from fugacity expansion at finite chemical potential for $N_f$ = 2 Wilson fermions
• Non-critical fluctuations of (net) charges and (net) protons from iEBE-VISHNU hybrid model
• Distribution of Canonical Determinants in QCD
• Probing QCD chiral cross over transition in heavy ion collisions with fluctuations
• Unfolding of event-by-event net-charge distributions in heavy-ion collision
• Higher moments of multiplicity fluctuations in a hadron-resonance gas with exact conservation laws
• Momentum scale dependence of the net quark number fluctuations near chiral crossover
• Statistical and dynamical parts of the cumulants of conserved charges in relativistic heavy ion collisions
• Event-by-Event Efficiency Fluctuations and Efficiency Correction for Cumulants of Superposed Multiplicity Distributions in Relativistic Heavy-ion Collision Experiments
• Effects of resonance weak decays and hadronic re-scattering on the proton number fluctuations in Au + Au collisions at $\sqrt{s_{\mathrm{NN}}}=5$ GeV from JAM model
• Rapidity scan approach for net-baryon cumulants with a statistical thermal model
• Net-baryon multiplicity distribution consistent with lattice QCD
• Measurement of the ratio of the sixth order to the second order cumulant of net-proton multiplicity distributions in relativistic heavy-ion collisions
• The sixth order cumulant of net-proton number in Binomial distribution at $\sqrt{s_{NN}}=$ 200 GeV
• Stable Yang-Lee zeros in truncated fugacity series from net-baryon number multiplicity distribution
• Understanding the negative binomial multiplicity fluctuations in relativistic heavy ion collisions
• Influence of statistics on the measured moments of conserved quantities in relativistic heavy ion collisions
• High cumulants of conserved charges and their statistical uncertainties
• The Equation of State and Multiparticle Production