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Title: Collision energy dependence of moments of net-kaon multiplicity distributions at RHIC

Journal Article · · Physics Letters B
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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 s 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 (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.

Research Organization:
Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Nuclear Physics (NP)
Contributing Organization:
STAR Collaboration
Grant/Contract Number:
SC0012704; AC02-05CH11231
OSTI ID:
1874525
Alternate ID(s):
OSTI ID: 1460830; OSTI ID: 1506370
Report Number(s):
BNL-207847-2018-JAAM; S0370269318306403; PII: S0370269318306403
Journal Information:
Physics Letters B, Journal Name: Physics Letters B Vol. 785 Journal Issue: C; ISSN 0370-2693
Publisher:
ElsevierCopyright Statement
Country of Publication:
Netherlands
Language:
English
Citation Metrics:
Cited by: 81 works
Citation information provided by
Web of Science

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