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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…
KbarN interaction and Kaons in the nuclear medium
A. Ramos, E. Oset
The s-wave meson-nucleon interaction in the S=-1 sector is studied by means of a coupled-channel Lippmann Schwinger equation, using the lowest order chiral Lagrangian and a cut off…
Two Pion Production in Nucleon-Nucleon Collisions at Intermediate Energies
L. Alvarez-Ruso, E. Oset, E. Hernandez
We have developed a model for the N N --> N N pi pi reaction and evaluated cross sections for the different charged channels. The low energy part of those channels where the pions…
N/D Description of Two Meson Amplitudes and Chiral Symmetry
J. A. Oller, E. Oset
The most general structure of an elastic partial wave amplitude when the unphysical cuts are neglected is deduced in terms of the N/D method. This result is then matched to lowest…
Isocalar Roper excitation in the pp --> pp pi0 reaction close to threshold
E. Hernandez, E. Oset
A new mechanism for the pp --> pp pi0 reaction close to threshold is suggested coming from the isoscalar excitation of the Roper and its decay into N(pi pi)S-wave, with one of the…
Weak Decay of Lambda Hypernuclei
E. Oset, A. Ramos
We review recent developments concerning the weak decay of Lambda hypernuclei. New studies covering the mesonic decay channel as well as recent models for the non-mesonic one are d…