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Collision Energy Dependence of Moments of Net-Kaon Multiplicity Distributions at RHIC
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arxiv 1709.00773 v2 pith:Q7MWGDQJ submitted 2017-09-03 nucl-ex hep-exhep-phnucl-th
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abstract
Fluctuations of conserved quantities such as baryon number, charge, and strangeness are sensitive to the correlation length of the hot and dense matter created in relativistic heavy-ion collisions and can be used to search for the QCD critical point. We report the first measurements of the moments of net-kaon multiplicity distributions in Au+Au collisions at $\sqrt{s_{\rm NN}}$ = 7.7, 11.5, 14.5, 19.6, 27, 39, 62.4, and 200 GeV. The collision centrality and energy dependence of the mean ($M$), variance ($\sigma^2$), skewness ($S$), and kurtosis ($\kappa$) for net-kaon multiplicity distributions as well as the ratio $\sigma^2/M$ and the products $S\sigma$ and $\kappa\sigma^2$ are presented. Comparisons are made with Poisson and negative binomial baseline calculations as well as with UrQMD, a transport model (UrQMD) that does not include effects from the QCD critical point. Within current uncertainties, the net-kaon cumulant ratios appear to be monotonic as a function of collision energy.
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Cited by 2 Pith papers
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A new diagrammatic formalism extends the evolution of charge correlations from two points to arbitrary n points under the assumption of local chemical equilibrium.
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Normalized symmetric cumulants as a measure of QCD phase transition: a viscous hydrodynamic study
hep-ph 2019-08 conditional novelty 6.0 of 10
A viscous hydrodynamic study shows that normalized symmetric cumulants of flow harmonics can discriminate a crossover QCD equation of state from a first-order one at 62.4 GeV Au+Au collisions.
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