QCD Critical Point and Net-Proton Number Fluctuations at RHIC-STAR

Abstract

In the search of QCD phase boundary and critical point, higher-order cumulants of conserved quantities are proposed as promising observables and have been studied extensively both experimentally and theoretically. In this paper we present cumulant ratios up to $6^{th}$-order of net-proton number distributions in Au+Au collisions at $\sqrt{{\mathrm{s}}_{\mathrm{NN}}}$ = 7.7 - 200 GeV from STAR Beam Energy Scan program phase I and $\sqrt{\mathrm{s}}$ = 200 GeV $p+p$ collisions. The results are compared with various models and Lattice QCD calculations.

arXiv comment4 pages, 3 figures; contribution to the 19th International Conference on Strangeness in Quark Matter (SQM 2021)

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