6,531 research outputs found
Weak Quasi-elastic Production of Hyperons
The quasielastic weak production of and hyperons from
nucleons and nuclei induced by antineutrinos is studied in the energy region of
some ongoing neutrino oscillation experiments in the intermediate energy
region. The hyperon nucleon transition form factors determined from neutrino
nucleon scattering and an analysis of high precision data on semileptonic
decays of neutron and hyperons using SU(3) symmetry have been used. The nuclear
effects due to Fermi motion and final state interaction effects due to hyperon
nucleon scattering have also been studied. The numerical results for
differential and total cross sections have been presented.Comment: 26 pages, 10 figure
meson transparency in nuclei from resonant interactions
We investigate the meson nuclear transparency using some recent
theoretical developments on the in medium self-energy. The inclusion of
direct resonant -scattering and the kaon decay mechanisms leads to a
width much larger than in most previous theoretical approaches. The
model has been confronted with photoproduction data from CLAS and LEPS and the
recent proton induced production from COSY finding an overall good
agreement. The results support the need of a quite large direct -scattering contribution to the self-energy
- …