Speaker
Tamal Kumar Mukherjee
(Institute of High Energy Physics, TPCSF)
Description
We follow chiral effective model [1] of a quarkonia nonet and a tetraquark nonet as well as a complex iso-singlet (glueball) field to study the lowest lying scalar mesons on the basis of chiral symmetry and UA(1) symmetry. By virtue of the isospin symmetry, the isospin 1 and isospin 1/2 physical states are assumed to have two and four bare quark components whereas I = 0 physical scalar and pseudoscalar mesons are assumed to have all the three bare components. We find that the model can accommodate the mass spectra of low-lying states quite well. Based on our result, we will discuss on the nature of the lowest iso-scalar f0(600) or sigma meson as well as the possible scalar and pseudoscalar glueball candidates.
Referece:
1. Tamal K. Mukherjee, Mei Huang and Qi-Shu Yan, arXiv:1203.5717 [hep-ph].
Primary author
Tamal Kumar Mukherjee
(Institute of High Energy Physics, TPCSF)
Co-authors
Mei Huang
(IHEP, CAS)
Qi-Shu Yan
(College of Physical Sciences, Graduate University of Chinese Academy of Sciences)
