Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Effect of Chiral Symmetry Restoration on Pentaquark $\Theta^+$ Mass and
  Width at Finite Temperature and Density   We investigate the effect of chiral phase transition on the pentaquark
$\Theta^+$ mass and width at one-loop level of $N\Theta^+K$ coupling at finite
temperature and density. The behavior of the mass, especially the width in
hadronic medium is dominated by the characteristics of chiral symmetry
restoration at high temperature and high density. The mass and width shifts of
positive-parity $\Theta^+$ are much larger than that of negative-parity one,
which may be helpful to determine the parity of $\Theta^+$ in high energy
nuclear collisions.

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The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
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The categories of this paper are: stat
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
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The categories of this paper are: math-ph
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The categories of this paper are: q-bio
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The categories of this paper are: cs
28
The categories of this paper are: alg-geom