Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Properties of charmonia in a hot equilibrated medium   We investigate the properties of charmonia in a thermal medium, showing that
with increasing temperature the decay widths of these mesons behave in a
non-trivial way. Our analysis is based on a potential model with interaction
potential extracted from thermal lattice QCD calculations of the free-energy of
a static quark-antiquark pair. We find that in the crossover region some decay
widths are extremely enhanced, which might be interpreted as a signature of the
transition from hadronic matter to the deconfined phase. In particular, at
temperatures $T\sim T_c$ the decay widths of the $J/\Psi$ that depend on the
value of the wave function at the origin are enhanced with respect to the
values in vacuum by about a factor 2. In the same temperature range the decay
width of the process $\chi_{c J} \to J/\Psi + \gamma$ is enhanced by
approximately a factor 6 with respect to the value in vacuum. At higher
temperatures the charmonia states dissociate and the widths of both decay
processes become vanishing small.

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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: nucl-ex
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The categories of this paper are: math
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The categories of this paper are: gr-qc
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The categories of this paper are: math-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: cmp-lg
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The categories of this paper are: adap-org
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The categories of this paper are: astro-ph
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: chao-dyn