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Pion Observables in the Extended NJL Model with Vector and Axial-Vector Mesons

✍ Scribed by Véronique Bernard; Alex H. Blin; Brigitte Hiller; Yuri P. Ivanov; Alexander A. Osipov; Ulf-G. Meißner

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
974 KB
Volume
249
Category
Article
ISSN
0003-4916

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✦ Synopsis

The momentum-space bosonization method of a Nambu and Jona-Lasinio type model with vector and axial-vector mesons is applied to ?? scattering. Unlike the case in earlier published papers, we obtain the ?? scattering amplitude using the linear and nonlinear realizations of chiral symmetry and fully taking into account the momentum dependence of meson vertices. We show the full physical equivalence between these two approaches. The chiral expansion procedure in this model is discussed in detail. Chiral expansions of the quark mass, pion mass and constant f ? are obtained. The low-energy ?? phase shifts are compared to the available data. We also study the scalar form factor of the pion.

1996 Academic Press, Inc.

1. Introduction

Coloured quarks and gluons are the main objects in the fundamental theory of the strong interactions, quantum chromodynamics (QCD), which are not directly article no.

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