Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chern-Simons current and local parity violation in hot QCD matter   Non-Abelian gauge theories "live" in a space-time with non-trivial topology
that can be characterized by an odd-dimensional Chern-Simons form. In QCD,
Chern-Simons form is induced by the chiral anomaly and the presence of
topological solutions; it opens a possibility for the breaking of P and CP
invariances in strong interactions ("the strong CP problem"). While there is
apparently no global P and CP violation in QCD, here I argue that topological
fluctuations in hot quark-gluon matter can become directly observable in the
presence of a very intense external magnetic field by inducing local P- and CP-
odd effects. These phenomena can be described by using the Maxwell-Chern-Simons
electrodynamics as an effective theory. Local P and CP violation in hot QCD
matter can be observed in experiment through the "chiral magnetic effect" - the
separation of electric charge along the axis of magnetic field that is created
by the colliding relativistic ions. There is a recent evidence for the electric
charge separation relative to the reaction plane of heavy ion collisions from
the STAR Collaboration at RHIC.

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The categories of this paper are: plasm-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: adap-org
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-lat
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The categories of this paper are: cs
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The categories of this paper are: hep-ex
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The categories of this paper are: stat
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The categories of this paper are: math-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph