Hep/Astro Seminar -- Wednesday 2nd March, 2000
The Axial Symmetry Restoration In a Chiral Random Matrix Model
G. Papp (Kent State)
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I construct a Chiral Random Matrix Model (ChRMM) which takes into account
both the zero and near-zero modes of the QCD Dirac operator. 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, in this ChRMM chiral and U(1)
symmetry are simultaneously restored for total pairing.
Finally, I 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. The results are
briefly contrasted with recent lattice simulations.
3:30pm, Smith Lab 4079
Jens O. Andersen(firstname.lastname@example.org),
last updated 24-SEP-97.