Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Restoration of chiral symmetry in the large-N_c limit   We study the large-N_c behavior of the critical temperature T_c for chiral
symmetry restoration in the framework of the Nambu-Jona-Lasinio (NJL) model and
the linear \sigma-model. While in the NJL case T_c scales as N_c^0 and is, as
expected, of the same order as \Lambda_QCD (just as the deconfinement phase
transition), in the \sigma-model the scaling behavior reads T_c \propto
N_c^1/2. We investigate the origin of the different scaling behavior and
present two improvements of the \sigma-model: (i) a simple, phenomenologically
motivated temperature dependence of the parameters and (ii) the coupling to the
Polyakov loop. Both approaches lead to the scaling T_c \propto N_c^0.

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The categories of this paper are: gr-qc
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The categories of this paper are: plasm-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: chem-ph
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The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: solv-int