Phys. Rev. Lett. 102, 032301 (2009) [4 pages]Non-Gaussian Fluctuations near the QCD Critical Point
See accompanying Physics Viewpoint We study the effect of the QCD critical point on non-Gaussian moments (cumulants) of fluctuations of experimental observables in heavy-ion collisions. We find that these moments are very sensitive to the proximity of the critical point, as measured by the magnitude of the correlation length ξ. For example, the cubic central moment of multiplicity ⟨(δN)3⟩∼ξ4.5 and the quartic cumulant ⟨(δN)4⟩c∼ξ7. We estimate the magnitude of critical point contributions to non-Gaussian fluctuations of pion and proton multiplicities. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.032301
DOI:
10.1103/PhysRevLett.102.032301
PACS:
25.75.Nq, 05.70.Jk, 25.75.Gz
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