PhysRevLett.107.052301.pdf (429.98 kB)
Sign of Kurtosis near the QCD Critical Point
journal contributionposted on 2012-03-06, 00:00 authored by M. A. Stephanov
We point out that the quartic cumulant (and kurtosis) of the order parameter fluctuations is universally negative when the critical point is approached on the crossover side of the phase separation line. As a consequence, the kurtosis of a fluctuating observable, such as, e.g., proton multiplicity, may become smaller than the value given by independent Poisson statistics. We discuss implications for the beam energy scan program at RHIC at BNL.
Publisher StatementStephanov, M. A Sign of Kurtosis near the QCD Critical Point,volume 107, article 052301, 2011. © 2011 by the American Physical Society. http://link.aps.org/doi/10.1103/PhysRevLett.107.052301
PublisherAmerican Physical Society