Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Net-baryon number variance and kurtosis within nonequilibrium chiral
  fluid dynamics   We study the variance and kurtosis of the net-baryon number in a fluid
dynamical model for heavy-ion collisions. It is based on an effective chiral
model with dilatons for the strong coupling regime of QCD. Taking into account
spinodal instabilities, we demonstrate that this model exhibits a diverging
quark number susceptibility and kurtosis all along the spinodal lines of the
first-order phase transition, with a change of universality class at the
critical end point. During the (3+1) dimensional expansion of a hot and dense
fireball, instabilities are created by fluctuations in the explicitly
propagated chiral and dilaton field. We find a clear enhancement of
event-by-event fluctuations of the baryon number at the critical point and
first-order phase transition in comparison with an evolution through the
crossover region.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
5
The categories of this paper are: gr-qc
22
The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio