Real-time thermal field theory analyses of 2D Gross-Neveu model
| dc.creator | Bang-Rong, Zhou | |
| dc.date | 2002-04-22 | |
| dc.date.accessioned | 2026-07-07T10:49:22Z | |
| dc.date.available | 2026-07-07T10:49:22Z | |
| dc.description | Discrete symmetry breaking and possible restoration at finite temperature $T$ are analysed in 2D Gross-Neveu model by the real-time thermal field theory in the fermion bubble approximation. The dynamical fermion mass $m$ is proven to be scale-independent and this fact indicates the equivalence between the fermion bubble diagram approximation and the mean field approximation used in the auxialiary scalar field approach. Reproducing of the non-zero critical temperature $T_c=0.567 m(0)$, ($m(0)$ is the dynamical fermion mass at T=0), shows the equivalence between the real-time and the imaginary-time thermal field theory in this problem. However, in the real-time formalism, more results including absence of scalar bound state, the equation of criticality curve of chemical potential-temperature and the $\ln(T_c/T)$ behavior of $m^2$ at $T\stackrel{<}{\sim} T_c$ can be easily obtained. The last one indicates the second-order phase transition feature of the symmetry restoration. | |
| dc.description | 8 pages, Latex, no figures | |
| dc.identifier | https://arxiv.org/abs/hep-th/0204176 | |
| dc.identifier | http://arxiv.org/abs/hep-th/0204176 | |
| dc.identifier | Commun.Theor.Phys.33:451-456,2000 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/184194 | |
| dc.subject | High Energy Physics - Theory | |
| dc.title | Real-time thermal field theory analyses of 2D Gross-Neveu model | |
| dc.type | text |