Evolution of the moments of multiplicity distributions
arXiv:1809.09653 · doi:10.1103/PhysRevC.98.064907
Abstract
Measured moments of the multiplicity distribution for a given sort of particles are used in the literature for the determination of the phase transition parameters of hot QCD matter in ultrarelativistic heavy-ion collisions. We argue that the subsequent cooling in the hadronic phase, however, may drive the multiplicity distribution out of equilibrium. We use a master equation for the description of the evolution of the multiplicity distribution to demonstrate how the different moments depart away from their equilibrium values. If such moments were measured and interpreted as if they were equilibrated, one would obtain different apparent temperatures from different moments.
arXiv comment8 pages, 7 figures, to be published in Physical Review C, in the updated version some references added, discussion extended and typos corrected
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