6 papers · 1 filter
On the resonant and non-resonant contributions to B\toρπ
Jose A. Oller
We discuss the importance of the background in order to understand the scattering in the J^{PC}=0^{++} low and intermediate energy region and in particular regarding the σmeson. In…
Scalar Mesons and Chiral Symmetry
J. A. Oller
It is the purpose of the present manuscript to emphasize those aspects that make the scalar sector with vacuum quantum numbers rather unique. Chiral symmetry is the basic tool for…
The phi --> pi^+ pi^- and phi radiative decays within a chiral unitary approach
E. Oset, S. Hirenzaki, E. Marco +3
We report on recent results on the decay of the phi into pi^+ pi^- and phi radiative decays into pi^0 pi^0 gamma and pi^0 eta gamma, which require the consideration of the final st…
A coupled channel unitary chiral approach to the meson-meson interaction and pion-pion scattering in a nuclear medium
E. Oset, J. A. Oller, J. R. Peláez +2
A new tool which combines chiral perturbation theory and unitarity in coupled channels is applied with success to the study of the meson-meson interaction, extending the theoretica…
Meson-Meson and Meson-Baryon Interactions in a chiral Non-perturbative Approach
E. Oset, J. A. Oller, J. R. Pelaez +1
A qualitative account of the meson-meson and meson-baryon interactions using chiral Lagrangians and the inverse amplitude method in coupled channels is done. The method, imposing e…
Chiral symmetry amplitudes in the S-wave isoscalar and isovector channels and the sigma, f_0(980), a_0(980) scalar mesons (HADRON'97)
J. A. Oller, E. Oset
We use a non-perturbative approach which combines coupled channel Lippmann-Schwinger equations with meson-meson potentials provided by the lowest order chiral Lagrangian. By means…