IFLP 13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
On covariant nonlocal chiral quark models with separable interactions
Autor/es:
DANIEL GOMEZ DUMM; ANA G. GRUNFELD; NORBERTO N. SCOCCOLA
Revista:
PHYSICAL REVIEW D - PARTICLE AND FILDS
Editorial:
The American Physical Society
Referencias:
Lugar: Ridge, N.Y., EE.UU.; Año: 2006 vol. 74 p. 54026 - 54026
ISSN:
0556-2821
Resumen:
We present a comparative analysis of chiral quark models which include nonlocal covariant fourfermion couplings. We consider two alternative ways of introducing the nonlocality, as well as various shapes for the momentum-dependent form factors governing the effective interactions. In all cases we study the behavior of model parameters and analyze numerical results for constituent quark masses and quark propagator poles. Advantages of these covariant nonlocal schemes over instantaneous nonlocal schemes and the standard NJL model are pointed out.
