Higher Moments of Net-Kaon Multiplicity Distributions at STAR

Abstract

Fluctuations of conserved quantities such as baryon number (B), electric charge number (Q), and strangeness number (S), are sensitive to the correlation length and can be used to probe non-gaussian fluctuations near the critical point. Experimentally, higher moments of the multiplicity distributions have been used to search for the QCD critical point in heavy-ion collisions. In this paper, we report the efficiency-corrected cumulants and their ratios of mid- rapidity (|y| < 0.5) net-kaon multiplicity distributions in Au+Au collisions at 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV collected in 2010, 2011, and 2014 with STAR at RHIC. The centrality and energy dependence of the cumulants and their ratios, are presented. Furthermore, the comparisons with baseline calculations (Poisson) and non-critical-point models (UrQMD) are also discussed.

arXiv commentThe Strangeness Quark Matter 2016

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Cited by in corpus (3)

• Search for the QCD Critical Point with Fluctuations of Conserved Quantities in Relativistic Heavy-Ion Collisions at RHIC : An Overview
• Cumulants of event-by-event net-strangeness distributions in Au+Au collisions at $\sqrt{s_{\mathrm{NN}}}$=7.7-200 GeV from UrQMD model
• Charge Conservation and Higher Moments of Charge Fluctuations