Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: $SU(2N_F)$ symmetry of confinement in QCD and its observation at high
  temperature   In this talk we first overview lattice results that have led to the
observation of new SU(2)_{CS} and SU(2N_F) symmetries upon artificial
truncation of the near-zero modes of the Dirac operator at zero temperature and
at high temperature without any truncation. These symmetries are larger than
the chiral symmetry of the QCD Lagrangian and contain chiral symmetries
SU(N_F)_L \times SU(N_F)_R and U(1)_A as subgroups. In addition to the standard
chiral transformations the SU(2)_{CS} and SU(2N_F) transformations mix the
right- and left-handed components of the quark fields. It is a symmetry of the
confining chromo-electric interaction while the chromo-magnetic interaction
manifestly breaks it. Emergence of these symmetries upon truncation of the
near-zero modes of the Dirac operator at T=0 means that all effects of the
chromo-magnetic interaction are located exclusively in the near-zero modes,
while confining chromo-electric interaction is distributed among all modes.
Appearance of these symmetries at high T, where the temperature suppresses the
near-zero modes, has radical implications because these symmetries are
incompatible with the asymptotically free deconfined quarks at increasing
temperature. The elementary objects in the high-temperature phase of QCD should
be quarks bound by the pure chromo-electric field that is not accompanied by
the chromo-magnetic effects.

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The categories of this paper are: stat
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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
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The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: alg-geom
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga