1/N(c) expansion of the quark condensate at finite temperature
Oct, 1995
20 pages
Published in:
- Phys.Rev.C 53 (1996) 2394-2400
e-Print:
- nucl-th/9511003 [nucl-th]
Report number:
- MPG-VT-UR-52-95,
- JINR-E2-95-386
Citations per year
Abstract:
Previously the quark and meson properties in a many quark system at finite temperature have been studied within effective QCD approaches in the Hartree approximation. In the present paper we consider the influence of the mesonic correlations on the quark self-energy and on the quark propagator within a systematic - expansion. Using a general separable ansatz for the nonlocal interaction, we derive a selfconsistent equation for the correction to the quark propagator. For a separable model with cut-off formfactor, we obtain a decrease of the condensate of the order of 10\% at zero temperature. A stabilization of the condensate with respect to temperature variation due to the inclusion of mesonic correlations is obtained what seems to be closer to the results from lattice calculations.- quark: chiral
- quark: propagator
- renormalization
- meson: correlation
- correlation: effect
- expansion 1/N: color
- Hartree approximation
- quark: condensation
- finite temperature
- Jona-Lasinio-Nambu model
References(25)
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