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Collision energy dependence of moments of net-kaon multiplicity distributions at RHIC
Adamczyk, L Adams, JR Adkins, JK Agakishiev, G Aggarwal, MM Ahammed, Z Ajitanand, NN Alekseev, I Anderson, DM Aoyama, R
Adamczyk, L
Adams, JR
Adkins, JK
Agakishiev, G
Aggarwal, MM
Ahammed, Z
Ajitanand, NN
Alekseev, I
Anderson, DM
Aoyama, R
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Journal Article
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2018-10-10
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10.1016/j.physletb.2018.07.066
Abstract
© 2018 The Author 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 sNN=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 (σ2), skewness (S), and kurtosis (κ) for net-kaon multiplicity distributions as well as the ratio σ2/M and the products Sσ and κσ2 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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Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
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