Hadronic correlation functions in the interacting instanton liquid
- Institute for Nuclear Theory, Department of Physics, University of Washington, Seattle, Washington 98195 (United States)
- Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)
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.}
- Research Organization:
- New York State University Research Foundation
- DOE Contract Number:
- FG02-88ER40388; FG06-90ER40561
- OSTI ID:
- 288967
- Journal Information:
- Physical Review, D, Vol. 54, Issue 1; Other Information: PBD: Jul 1996
- Country of Publication:
- United States
- Language:
- English
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