Thermal and curvature effects to dynamical symmetry breaking
PhysRevD_56_5097.pdf 182 KB
We investigate the thermal and curvature effects to dynamical symmetry breaking in a four-fermion model. The effective potential is evaluated in the leading order of the 1/N expansion at finite temperature on positive curvature space R⊗SD-1 or on negative curvature space R⊗HD-1 with varying temperature and curvature. We argue the combined effects of the temperature and curvature to the phase structure. The broken chiral symmetry is restored for a sufficiently high temperature and/or large positive curvature. The negative curvature enhances the chiral symmetry breaking. It is found that the thermal effect restores the symmetry at high temperature even in negative curvature spacetime.
Physical Review D
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American Physical Society
Copyright (c) 1997 The American Physical Society.
Graduate School of Science