1998/05/30 by Yasuo Umino, Y. Umino, Umino, Y. +3
Engineering · Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #High-Energy Particle Collisions Research #Nuclear Theory (nucl-th) #Quantum Chromodynamics and Particle Interactions #Superconducting Materials and Applications #hep-ph #nucl-th
paper · pdf · doi:10.48550/arxiv.nucl-th/9806001
ReVTeX, 29 pages, 3 Postscript figures, Submitted to Phys. Rev. C
arxiv created 1998/05/30 · openalex publication_date 1998/05/30 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In this two part series a chiral confining model of baryons is used to describe low--lying negative parity resonances N^*, Δ^*, Λ^* and Σ^* in the mean field approximation. A physical baryon in this model consists of interacting valence quarks, mesons and a color and chiral singlet hybrid field coexisting inside a dynamically generated confining region. This first paper presents the quark contribution to the masses and wave functions of negative parity baryons calculated with an effective spin--isospin dependent instanton induced interaction. It does not include meson exchanges between quarks. The three--quark wave functions are used to calculate meson--excited baryon vertex functions to lowest order in meson--quark coupling. When the baryons are on mass--shell each of these vertex functions is a product of a coupling constant and a form factor. As examples, quark contributions to N^* hadronic form factors as well as axial coupling constants are extracted from the vertex functions and problems with the analytical behaviour of the model form factors are discussed. The second paper will examine the mesonic corrections to excited baryon properties in the heavy baryon and one--loop approximations.