Quark self-energy beyond the mean field at finite temperature

Journal Article · Sat Apr 01 04:00:00 EST 1995 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.51.2256· OSTI ID:6473508

Zhuang, P ^[1]

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1. Institut fuer Theoretische Physik, Philosophenweg 19, D-69120 Heidelberg (Germany)

The Nambu--Jona-Lasinio model, an effective low-energy model of QCD, is extended to the next to the leading order in the 1/[ital N][sub [ital c]] expansion at finite temperature and density. The contributions to the quark self-energy and the constituent quark mass from the meson dressing are considered in a perturbative approach about the mean field. In particular, the temperature dependence of the quark mass is shown numerically at zero chemical potential. The correction to the quark mass from the meson dressing amounts to 20% compared to the result of the leading order at low temperature, and rapidly approaches zero at high temperature.

• OSTI ID: 6473508
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 51:4; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

662240 -- Models for Strong Interactions-- (1992-)
663300* -- Nuclear Reactions & Scattering
General-- (1992-)
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BOSONS
CORRECTIONS
DENSITY
ELEMENTARY PARTICLES
ENERGY
EXPANSION
FERMIONS
FIELD THEORIES
HADRONS
MASS
MATHEMATICAL MODELS
MATHEMATICS
MEAN-FIELD THEORY
MESONS
NUMERICAL ANALYSIS
PARTICLE MODELS
PERTURBATION THEORY
PHYSICAL PROPERTIES
POSTULATED PARTICLES
QUANTUM CHROMODYNAMICS
QUANTUM FIELD THEORY
QUARKS
SELF-ENERGY
TEMPERATURE DEPENDENCE
UNIFIED GAUGE MODELS