Measurement of the Sixth-Order Cumulant of Net-Proton Distributions in Au+Au Collisions from the STAR Experiment

Abstract

Higher-order cumulants of the net-baryon multiplicity distributions are predicted to be sensitive to the properties of the nuclear matter created in high-energy nuclear collisions. In this talk, we present the collision centrality and acceptance (rapidity and transverse momentum) dependence of the ratio of the 6${}^{\mathrm{th}}$- to the 2${}^{\mathrm{nd}}$-order cumulant ratio ($C_6/C_2$) of net-proton in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}=54.4$ and 200 GeV measured by the STAR detector at RHIC. The new results are compared to hadron transport model and lattice QCD calculations.

arXiv comment4 pages, 2 figure, Quark Matter 2019 proceedings

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• Quartic cumulant of baryon number in the presence of QCD critical point
• Pileup corrections on higher-order cumulants
• Pileup Correction on Higher-order Cumulants with Unfolding Approach
• Overview of the QCD phase diagram -- Recent progress from the lattice
• "QM19 summary talk": Outlook and future of heavy-ion collisions
• The sixth order cumulant of net-proton number in Binomial distribution at $\sqrt{s_{NN}}=$ 200 GeV
• Chemical Freeze-out Parameters via a Non-perturbative QCD Approach
• Corrections to the hadron resonance gas from lattice QCD and their effect on fluctuation-ratios at finite density