Kenji Morita, Bengt Friman, Krzysztof Redlich, Vladimir Skokov
We investigate properties of the probability distribution of the net quark number near the chiral transition in the quark-meson model. The calculations are performed within the functional renormalization group method and under mean-field approximation. We show, that there is a subtantial influence of the remnant of the chiral phase transition on the properties of the probability distribution. In particular, at physical pion mass, the presence of mesonic fluctuations modifies the distribution from the mean-field one, as well as, from the Skellam distribution which is set as the reference for a non critical behavior. An intrinsic feature of the net quark number probability distribution is, that in the vicinity of the chiral crossover transition it is narrower than the corresponding Skellam function. We also discuss scaling properties of the probability distribution and the resulting cumulants.
View original:
http://arxiv.org/abs/1301.2873
No comments:
Post a Comment