Scalar Mesons: A Chiral Lagrangian Framework for their Mixing and Substructure
Abstract
The highlights of studies of mixing among scalar mesons below and above 1 GeV within a nonlinear chiral Lagrangian framework is briefly presented. Two scalar meson nonets are introduced to explore the mass spectrum and decay properties of the =1/2 and =1 scalar states. For the =0 states, in addition to these two nonets a scalar glueball component is also taken into account, and together with the constraints from the =1/2 and =1 sectors, their mass spectrum is studied. The fact that an ideally mixed scalar nonet has a mass ordering which is opposite to that of an ideally mixed four-quark scalar nonet is exploited to gain some insight into the quark substructure of the =1/2, =1 and =0 states below and above 1 GeV. Consequently, numerical estimates of various components of these states (two quark and four quark components of =1/2 and =1 states, and two quark, four quark and glue component of =0 states) are determined.
Cite
@article{arxiv.0801.0399,
title = {Scalar Mesons: A Chiral Lagrangian Framework for their Mixing and Substructure},
author = {Amir H. Fariborz},
journal= {arXiv preprint arXiv:0801.0399},
year = {2008}
}
Comments
Talk given at MENU 2007, the 11th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon, September 10-14, 2007, IKP, Forschungzentrum Juelich, Germany