Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonlocal quark model beyond mean field and QCD phase transition   A nonlocal chiral quark model is consistently extended beyond mean field
using a strict 1/Nc expansion scheme. The parameters of the nonlocal model are
refitted to the physical values of the pion mass and the weak pion decay
constant. The size of the 1/Nc correction to the quark condensate is carefully
studied in the nonlocal and the usual local Nambu-Jona-Lasinio models. It is
found that even the sign of the corrections can be different. This can be
attributed to the mesonic cut-off of the local model. It is also found that the
1/Nc corrections lead to a lowering of the temperature of the chiral phase
transition in comparison with the mean-field result. On the other hand, near
the phase transition the 1/Nc expansion breaks down and a non-perturbative
scheme for the inclusion of mesonic correlations is needed in order to describe
the phase transition point.

30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
25
The categories of this paper are: patt-sol