scholarly journals Chiral symmetry breaking in the gauged NJL model in curved spacetime

1996 ◽  
Vol 53 (12) ◽  
pp. 7321-7326 ◽  
Author(s):  
B. Geyer ◽  
S. D. Odintsov
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Curved Spacetime ◽  
Njl Model

MESONS AND DIQUARKS IN A NJL MODEL AT FINITE TEMPERATURE AND CHEMICAL POTENTIAL

1993 ◽  
Vol 08 (07) ◽  
pp. 1295-1312 ◽  
Author(s):  
D. EBERT ◽  
YU. L. KALINOVSKY ◽  
L. MÜNCHOW ◽  
M.K. VOLKOV
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Finite Temperature ◽  
Chemical Potential ◽  
Chiral Symmetry Breaking ◽  
Baryon Number ◽  
Coupling Constants ◽  
Number Density ◽  
Njl Model

An extended NJL model with [Formula: see text] and (qq)-interactions is studied at finite temperature and baryon number density. We investigate the chiral symmetry breaking, its restoration and the behavior of meson and diquark masses, decay and coupling constants as functions of T and µ.

scholarly journals Supersymmetric Nambu–Jona-Lasinio Model in an External Gravitational Field

1997 ◽  
Vol 12 (30) ◽  
pp. 2271-2277 ◽  
Author(s):  
I. L. Buchbinder ◽  
T. Inagaki ◽  
S. D. Odintsov
Keyword(s):  
Gravitational Field ◽  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Effective Potential ◽  
Chiral Symmetry Breaking ◽  
Leading Order ◽  
Gravitational Fields ◽  
External Gravitational Field ◽  
Njl Model ◽  
Curvature Approximation

We investigate the effect of an external gravitational fields to the chiral symmetry breaking in the supersymmetric (SUSY) Nambu–Jona-Lasinio (NJL) model coupled to gravity in a non-supersymmetric way. Evaluating the effective potential in the leading order of the 1/Nc-expansion and in the linear curvature approximation, it is possible to have the chiral symmetry breaking in the SUSY NJL model in an external gravitational fields. In the broken phase the dynamically generated mass is analytically and numerically calculated.

scholarly journals NAMBU–JONA–LASINIO MODEL IN CURVED SPACETIME WITH MAGNETIC FIELD

1996 ◽  
Vol 11 (25) ◽  
pp. 2053-2063 ◽  
Author(s):  
B. GEYER ◽  
L.N. GRANDA ◽  
S.D. ODINTSOV
Keyword(s):  
Magnetic Field ◽  
Gravitational Field ◽  
Chiral Symmetry ◽  
Proper Time ◽  
Chiral Symmetry Breaking ◽  
Curved Spacetime ◽  
Njl Model ◽  
Nonzero Curvature ◽  
Curvature Approximation ◽  
The Magnetic Field

We discuss the phase structure of the NJL model in curved spacetime with magnetic field using 1/N-expansion and linear curvature approximation. The effective potential for composite fields [Formula: see text] is calculated using the proper-time cutoff in the following cases: (a) at nonzero curvature, (b) at nonzero curvature and nonzero magnetic field, and (c) at nonzero curvature and nonzero covariantly constant gauge field. Chiral symmetry breaking is studied numerically. We show that the gravitational field may compensate the effect of the magnetic field what leads to restoration of chiral symmetry.

Chiral Symmetry Breaking as a Phase Transition in QED Plus NJL Model

1994 ◽  
Vol 21 (1) ◽  
pp. 73-84 ◽  
Author(s):  
Guang-Jiong Ni ◽  
Ji-Fang Yang ◽  
Dao-Hia Xu ◽  
Su-Qing Chen
Keyword(s):  
Phase Transition ◽  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Njl Model

scholarly journals Influence of QED Corrections on the Orientation of Chiral Symmetry Breaking in the NJL Model

2007 ◽  
Vol 117 (1) ◽  
pp. 139-160 ◽  
Author(s):  
Takahiro Fujihara ◽  
Tomohiro Inagaki ◽  
Daiji Kimura
Keyword(s):  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Chiral Symmetry Breaking ◽  
Njl Model

scholarly journals TOPOLOLOGICAL CHIRAL SYMMETRY BREAKING IN SUSY NJL IN CURVED SPACE–TIME

1998 ◽  
Vol 13 (02) ◽  
pp. 145-151 ◽  
Author(s):  
L. N. GRANDA
Keyword(s):  
Gravitational Field ◽  
Symmetry Breaking ◽  
Chiral Symmetry ◽  
Effective Potential ◽  
Chiral Symmetry Breaking ◽  
Curved Space ◽  
External Gravitational Field ◽  
Njl Model ◽  
Nontrivial Topology ◽  
External Curvature

The effective potential in the model introduced by Buchbinder–Inagaki–Odintsov (BIO)1 which represents SUSY NJL model non-minimally coupled with the external gravitational field is found. The topology of the space is considered to be nontrivial. Chiral symmetry breaking under the action of external curvature and nontrivial topology is investigated.

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