https://doi.org/10.1140/epja/i2008-10689-y
Regular Article - Theoretical Physics
Nature of the axial-vector mesons from their Nc behavior within the chiral unitary approach
1
Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC, Valencia, Spain
2
Institutos de Investigación de Paterna, Apdo 22085, 46071, Valencia, Spain
3
Departamento de Física Teórica II, Universidad Complutense de Madrid, 28040, Madrid, Spain
4
Departamento de Física, Universidad de Murcia, E-30071, Murcia, Spain
Received:
4
September
2008
Revised:
5
November
2008
Published online:
15
December
2008
By describing within the chiral unitary approach the s -wave interaction of the vector meson nonet with the octet of pseudoscalar Goldstone bosons, we find that the main component of the axial-vector mesons --b
1(1235) , h
1(1170) , h
1(1380) , a
1(1260) , f
1(1285) and the two states associated to the K
1(1270) -- does not follow the QCD dependence on the number of colors for ordinary q
mesons.
PACS: 12.39.Fe Chiral Lagrangians – / 11.15.Pg Expansions for large numbers of components (e.g., 1/N c expansions) – / 12.39.Mk Glueball and nonstandard multi-quark/gluon states – / 13.75.Lb Meson-meson interactions –
© SIF, Springer-Verlag Berlin Heidelberg, 2009
