f_0(600), kappa(800), rho(770) and K*(892), quark mass dependence from unitarized SU(3) Chiral Perturbation Theory

Understand

We study the strange and non-strange quark mass dependence of the parameters of the f_0(600), kappa(800), rho(770) and K*(892) resonances generated from elastic meson-meson scattering using unitarized one-loop Chiral Perturbation Theory.

• We fit simultaneously all experimental scattering data up to 0.8-1 GeV together with lattice results on decay constants and scattering lengths up to a pion mass of 440 MeV.
• Then, the strange and non-strange quark masses are varied from the chiral limit up to values of interest for lattice studies.
• In these amplitudes, the mass and width of the rho(770) and K*(892) present a similar and smooth quark mass dependence.