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Chiral and deconfinement transitions in strong coupling lattice QCD with finite coupling and Polyakov loop effects

Nakano, Takashi Z. ; Miura, Kohtaroh ; Ohnishi, Akira

Physical review. D, Particles and fields, 2011-01, Vol.83 (1), Article 016014

United States

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Título:
Chiral and deconfinement transitions in strong coupling lattice QCD with finite coupling and Polyakov loop effects
Autor: Nakano, Takashi Z. ; Miura, Kohtaroh ; Ohnishi, Akira
Assuntos: APPROXIMATIONS ; B QUARKS ; BEAUTY PARTICLES ; C QUARKS ; CALCULATION METHODS ; CHARM PARTICLES ; CHIRALITY ; COLOR MODEL ; COMPOSITE MODELS ; CONDENSATES ; CONSTRUCTIVE FIELD THEORY ; COUPLING ; ELEMENTARY PARTICLES ; EXPANSION ; FERMIONS ; FIELD THEORIES ; FLUCTUATIONS ; LATTICE FIELD THEORY ; LIE GROUPS ; MASS ; MATHEMATICAL MODELS ; MEAN-FIELD THEORY ; MEASURING METHODS ; MONTE CARLO METHOD ; PARTICLE MODELS ; PARTICLE PROPERTIES ; PHYSICAL PROPERTIES ; PHYSICS OF ELEMENTARY PARTICLES AND FIELDS ; POSTULATED PARTICLES ; QUANTUM CHROMODYNAMICS ; QUANTUM FIELD THEORY ; QUARK MODEL ; QUARKS ; STRONG-COUPLING MODEL ; SU GROUPS ; SU-3 GROUPS ; SYMMETRY GROUPS ; T QUARKS ; THERMODYNAMIC PROPERTIES ; TOP PARTICLES ; TRANSITION TEMPERATURE ; VARIATIONS
É parte de: Physical review. D, Particles and fields, 2011-01, Vol.83 (1), Article 016014
Descrição: We investigate chiral and deconfinement transitions in the framework of the strong coupling lattice QCD for color SU(3) with one species of unrooted staggered fermion at finite temperature and quark chemical potential. We take account of the leading order Polyakov loop terms as well as the next-to-next-to-leading order (1/g{sup 4}) fermionic terms of the strong coupling expansion in the effective action. We investigate the Polyakov loop effects by comparing two approximation schemes, a Haar measure method (no fluctuation from the mean field) and a Weiss mean-field method (with fluctuations). The effective potential is obtained in both cases, and we analytically clarify the Polyakov loop contributions to the effective potential. The Polyakov loop is found to suppress the chiral condensate and to reduce the chiral transition temperature at {mu}=0, and the chiral transition temperature roughly reproduces the Monte Carlo results at {beta}=2N{sub c}/g{sup 2} < or approx. 4. The deconfinement transition is found to be the crossover and first order for light (am{sub 0} < or approx. 4 at {beta}=4) and heavy quark masses, respectively.
Editor: United States
Idioma: Inglês

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Chiral and deconfinement transitions in strong coupling lattice QCD with finite coupling and Polyakov loop effects

Nakano, Takashi Z. ; Miura, Kohtaroh ; Ohnishi, Akira

United States

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