Non-Gaussian fluctuations near the QCD critical point

Details Non-Gaussian fluctuations near the QCD critical point Non-Gaussian fluctuations near the QCD critical point

2008-09-21

arxiv.org/abs/0809.3450v1

Phys.Rev.Lett.102:032301,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.102.032301

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 xi. For example, the cubic central moment of multiplicity ~ xi^4.5 and the quartic cumulant ~ xi^7. We estimate the magnitude of critical point contributions to non-Gaussian fluctuations of pion and proton multiplicities.

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