Decays of excited pseudoscalar and vector mesons in the chiral U(3) x U(3)model

Citation
Mk. Volkov et al., Decays of excited pseudoscalar and vector mesons in the chiral U(3) x U(3)model, NUOV CIM A, 112(9), 1999, pp. 955-975
Citations number
23
Categorie Soggetti
Physics
Journal title
NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA A-NUCLEI PARTICLES AND FIELDS
ISSN journal
11241861 → ACNP
Volume
112
Issue
9
Year of publication
1999
Pages
955 - 975
Database
ISI
SICI code
1124-1861(199909)112:9<955:DOEPAV>2.0.ZU;2-Q
Abstract
A chiral U(3) x U(3) Lagrangian containing, besides the usual meson fields, their first radial excitations is considered. The Lagrangian is derived by bosonization of the Nambu-Jona-Lasinio (NJL) quark model with separable no nlocal interactions. The spontaneous breaking of chiral symmetry is governe d by the NJL gap equation. The first radial excitations of the pion, rho, o mega, kaon, K* and phi are described with the help of form factors. The val ues for the decay widths for the precesses pi' --> rho pi, rho' --> 2 pi, r ho' --> omega pi, omega' --> rho pi, K*' --> rho K, K*' --> K*pi, K*' --> K pi, phi' --> K*K, phi' --> (K) over bar K, K' --> K rho, K' --> K*pi and K ' --> K2 pi are obtained in satisfactory agreement with the experimental da ta.