Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: U(1) Problem at Finite Temperature   We model the effects of a large number of zero and near-zero modes in the QCD
partition function by using sparse chiral matrix models with an emphasis on the
quenched topological susceptibility in the choice of the measure. At finite
temperature, the zero modes are not affected by temperature but are allowed to
pair into topologically neutral near-zero modes which are gapped at high
temperature. In equilibrium, chiral and U(1) symmetry are simultaneously
restored for total pairing, evading mean-field arguments. We analyze a number
of susceptibilities versus the light quark masses. At the transition point the
topological susceptibility vanishes, and the dependence on the vacuum angle
$\theta$ drops out. Our results are briefly contrasted with recent lattice
simulations.

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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: funct-an
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The categories of this paper are: supr-con
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The categories of this paper are: atom-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: q-bio
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: stat
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The categories of this paper are: eess