2006/07/03 by D. Gómez Dumm, D. Gomez Dumm, A. G. Grunfeld +1
Mathematics · Physics and Astronomy · #Covariant transformation #High-Energy Particle Collisions Research #Mathematical analysis #Mathematical physics #Mathematics #Particle physics #Particle physics theoretical and experimental studies #Physics #Propagator #Quantum #Quantum Chromodynamics and Particle Interactions #Quantum electrodynamics #Quantum mechanics #Quantum nonlocality #Quark #Quark model #Separable space #Theoretical physics #hep-ph
paper · pdf · doi:10.1103/physrevd.74.054026
published as Phys.Rev. D74 (2006) 054026 · 12 pages, 2 figures
arxiv created 2006/07/03 · openalex publication_date 2006/09/21 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.