On covariant nonlocal chiral quark models with separable interactions

Details On covariant nonlocal chiral quark models with separable interactions On covariant nonlocal chiral quark models with separable interactions

2006-07-03

arxiv.org/abs/hep-ph/0607023v1

Phys.Rev. D74 (2006) 054026

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 2 figures

Scientific paper

10.1103/PhysRevD.74.054026

We present a comparative analysis of chiral quark models which include nonlocal covariant four-fermion 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.

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