RHO-OMEGA MIXING AND THE PION ELECTROMAGNETIC FORM-FACTOR IN THE NAMBU-JONA-LASINIO MODEL

Citation
R. Friedrich et H. Reinhardt, RHO-OMEGA MIXING AND THE PION ELECTROMAGNETIC FORM-FACTOR IN THE NAMBU-JONA-LASINIO MODEL, Nuclear physics. A, 594(4), 1995, pp. 406-418
Citations number
26
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics, Nuclear
Journal title
ISSN journal
0375-9474
Volume
594
Issue
4
Year of publication
1995
Pages
406 - 418
Database
ISI
SICI code
0375-9474(1995)594:4<406:RMATPE>2.0.ZU;2-H
Abstract
The rho omega mixing generated by the isospin breaking of the current quark masses m(u) not equal m(d) is studied within the bosonized NJL m odel in the gradient expansion. The resulting effective meson Lagrangi an naturally embodies vector meson dominance. By including pion loops an excellent description of both the pion electromagnetic form Factor and of the pi(+)pi(-) phase shifts in the vector-isovector channel is obtained.