  The thermodynamics of four-dimensional SU(2) N=2 super-Yang-Mills theory is
examined in both high and low temperature regimes. At low temperatures,
compelling evidence is found for two distinct equilibrium states related by a
spontaneously broken discrete R-symmetry. These equilibrium states exist
because the quantum moduli space of the theory has two singular points where
extra massless states appear. At high temperature, a unique
R-symmetry-preserving equilibrium state is found. Discrepancies with previous
results in the literature are explained.

High Energy Physics - Theory