Higher Moments of Net Proton Multiplicity Distributions at RHIC
Name
Aggarwal-2010-Higher Moments of Ne.pdf
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Author(s)
Balewski, Jan T.
Betancourt, Michael Joseph
Corliss, Ross Cameron
Hays-Wehle, James Prewitt
Jones, Christopher LaDon
Kocoloski, Adam Philip
Leight, William Axel
Sakuma, Tai
Seele, Joseph Patrick
Surrow, Bernd
Date Issued
July 2010
Journal
Physical review letters
Publisher
American Physical Society
Citation
Aggarwal, M. et al. “Higher Moments of Net Proton Multiplicity Distributions at RHIC.” Physical Review Letters 105.2 (2010): n. pag. © 2010 The American Physical Society
Version
Final published version
Abstract
We report the first measurements of the kurtosis (κ [kappa]), skewness (S), and variance (σ [sigma] [superscript 2]) of net-proton multiplicity (N [subscript p]-N [subscript p̅] ) distributions at midrapidity for Au+Au collisions at √sNN=19.6, 62.4, and 200 GeV corresponding to baryon chemical potentials (μ [mu] B) between 200 and 20 MeV. Our measurements of the products κ [kappa]σ [sigma][superscript 2] and Sσ [sigma], which can be related to theoretical calculations sensitive to baryon number susceptibilities and long-range correlations, are constant as functions of collision centrality. We compare these products with results from lattice QCD and various models without a critical point and study the √sNN dependence of κ [kappa] σ [sigma] [superscript 2]. From the measurements at the three beam energies, we find no evidence for a critical point in the QCD phase diagram for μ [mu] [subscript B] below 200 MeV.
MIT Department
Bates Linear Accelerator Center
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.022302
