Can hadrons survive the chiral phase transition ?

Abstract

We study mesonic and baryonic correlation functions in the temporal directions in the vicinity of the critical temperature $T\simeq T_c$ using the instanton liquid model. In this model chiral symmetry restoration is driven by the formation of instanton-antiinstanton molecules. Although we find the signals for all hadronic poles to be drastically reduced, some hadronic states seem to survive the phase transition, as loosely bound $U(N_f)\times U(N_f)$ chiral multiplets in the plasma phase. These states are the $0^{+}-0^{-}$ mesons $(\pi ,\sigma ,{\eta }^{\prime },\delta )$ and the $N({\frac{1}{2}}^{+})-N({\frac{1}{2}}^{-})$ baryons.

Comments: 11 pages, Latex with epsf macros, 2 uuencoded figures