Journal
PHYSICAL REVIEW D
Volume 61, Issue 10, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.61.105017
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The QCD phase diagram may feature a critical end point at a temperature T and baryon chemical potential mu which is accessible in heavy-ion collisions. The universal long wavelength fluctuations which develop near this Ising critical point result in experimental signatures which can be used to find the critical point. The magnitude of the observed effects depends on how large the correlation length xi becomes. Because the matter created in a heavy-ion collision cools through the critical region of the phase diagram in a finite time, critical slowing down limits the growth of xi, preventing it from staying in equilibrium. This is the fundamental nonequilibrium effect which must be calculated in order to make quantitative predictions for experiment. We use universal nonequilibrium dynamics and phenomenologically motivated values for the necessary nonuniversal quantities to estimate how much the growth of xi is slowed.
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