6533b854fe1ef96bd12aea3e
RESEARCH PRODUCT
Chiral symmetry and meson exchange approach to hypernuclear decay
J.e. PalomarEulogio OsetDaisuke Jidosubject
PhysicsNuclear and High Energy PhysicsParticle physicsChiral symmetryMesonNuclear TheoryNuclear TheoryFOS: Physical sciencesFísicaUncorrelatedNuclear Theory (nucl-th)PionHigh Energy Physics::ExperimentNuclear Experimentdescription
We take an approach to the $\Lambda$ nonmesonic weak decay in nuclei based on the exchange of mesons under the guidelines of chiral Lagrangians. The one pion and one kaon exchange are considered, together with the exchange of two pions, either correlated, leading to an important scalar-isoscalar exchange ($\sigma$-like exchange), or uncorrelated (box diagrams). A drastic reduction of the OPE results for the $\Gamma_n/\Gamma_p$ ratio is obtained and the new results are compatible with all present experiments within errors. The absolute rates obtained for different nuclei are also in fair agreement with experiment.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2000-11-29 |