Low Lying Scalar Resonances and Chiral Symmetry

Abstract

Current theoretical studies on the $\sigma$ and $\kappa$ resonances are reviewed. It is emphasized that all evidences accumulated so far are consistent with the picture that the $\sigma$ meson is the chiral partner of the Nambu--Goldstone bosons in a linear realization of chiral symmetry.

Invited plenary talk given at CHIRAL 2007, Nov. 13-16, 2007, RCNP, Osaka, Japan

References in corpus (2)

• Mixings of 4-quark components in light non-singlet scalar mesons in QCD sum rules
• On the scalar nonet in the extended Nambu Jona-Lasinio model