Properties of light resonances from unitarized Chiral perturbation theory: Nc behavior and quark mass dependence

Abstract

We review the unitarization of Chiral Perturbation Theory with dispersion relations and how it describes meson-meson scattering data, generating light resonances whose mass, width and nature can be related to QCD parameters like quark masses and the number of colors.

Invited review talk for the New Frontiers in QCD 2010, Yukawa International Program for Quark-Hadron Sciences (YIPQS), January 18 (Mon) - March 19 (Fri), 2010 Yukawa Institute for Theoretical Physics, Kyoto, Japan. To appear in Progress of Theoretical Physics

References in corpus (6)

• A low-lying scalar meson nonet in a unitarized meson model
• Quark mass dependence of the rho and sigma from dispersion relations and Chiral Perturbation Theory
• Lattice study of light scalar tetraquarks with I=0,2,1/2,3/2: are sigma and kappa tetraquarks?
• Infrared regularization for spin-1 fields
• Structure of the lightest scalar meson from the 1/Nc expansion of Unitarized Chiral Perturbation Theory and Regge Theory
• Comments on the large Nc behavior of light scalars

Cited by in corpus (7)

• From controversy to precision on the sigma meson: a review on the status of the non-ordinary $f_0(500)$ resonance
• Chiral extrapolation of light resonances from one and two-loop unitarized Chiral Perturbation Theory versus lattice results
• Chiral Perturbation Theory, the $1/N_c$ expansion and Regge behaviour determine the structure of the lightest scalar meson
• Tetraquarks, hadronic molecules, meson-meson scattering and disconnected contributions in lattice QCD
• The Large $N_c$ limit of QCD on the lattice
• Effect of sigma meson on the $D_1(2430)\to D\pi \pi$ decay
• $N_C$ evolution of the light meson resonances