Hadronic correlation functions in the interacting instanton liquid.

In this paper we study hadronic correlation functions in the interacting instanton liquid model, both at zero and nonzero temperature {ital T}. At zero {ital T} we investigate the dependence of the correlators on the instanton ensemble, in particular, the effect of the fermionic determinant. We demonstrate that quark-induced correlations between instantons are important, especially in the repulsive {eta}{sup {prime}} and {delta}-meson channels. We also calculate a large number of mesonic and baryonic correlation functions as a function of temperature. We find three different types of behavior as {ital T}{r_arrow}{ital T}{sub {ital c}}. The vector channels {rho},{ital a}{sub 1},{Delta} show a gradual melting of the resonance contribution and approach free quark behavior near the chiral phase transition. The light pseudoscalars and scalars {pi},{sigma} as well as the nucleon show stable resonance contributions, probably even surviving above {ital T}{sub {ital c}}. Correlation functions in the heavy scalar channels {eta}{sup {prime}},{delta} are enhanced as {ital T}{r_arrow}{ital T}{sub {ital c}}. {copyright} {ital 1996 The American Physical Society.}