NJL with eight quark interactions: Chiral phases at finite T
- Departamento de Fisica, Universidade de Coimbra, P-3004-516 Coimbra (Portugal)
- Joint Institute for Nuclear Research, Laboratory of Nuclear Problems, 141980 Dubna (Russian Federation)
The thermodynamic potential and thermal dependence of low lying mass spectra of scalars and pseudoscalars are evaluated in a generalized Nambu--Jona-Lasinio model, which incorporates eight-quark interactions. These are necessary to stabilize the scalar effective potential for the light and strange quark flavors, which would be otherwise unbounded from below. In addition it turns out that they are also crucial to i) lower the temperature of the chiral transition, in conformity with lattice calculations, ii) sharpen the temperature interval in which the crossover occurs, iii) or even allow for first order transitions to occur with realistic quark mass values, from certain critical values of the parameters. These are unprecedented results which cannot be obtained within the NJL approaches restricted to quartic and six-quark interactions.
- OSTI ID:
- 21149183
- Journal Information:
- AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1030; ISSN APCPCS; ISSN 0094-243X
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effects of eight-quark interactions on the hadronic vacuum and mass spectra of light mesons
Light front NJL model at finite temperature