Artículo
Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay
Fecha de publicación:
08/01/2013
Editorial:
Elsevier Science
Revista:
Nuclear Physics A
ISSN:
0375-9474
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
A consistent microscopic model is applied to the calculation of the nucleon emission spectra in the nonmesonic weak decay of Λ-hypernuclei. We adopt a nuclear matter formalism extended to finite nuclei via the local density approximation, a one-meson exchange weak transition potential and a Bonn nucleon–nucleon strong potential. Ground state correlations and final state interaction, at second order in the nucleon–nucleon interaction, are introduced on the same footing for all the isospin channels of one- and two-nucleon induced decays. Double-coincidence nucleon spectra are predicted for 12 ΛC and compared with recent KEK data. Discrepancies with data remain for proton emission and for both neutron–proton and neutron–neutron emission in the non-back-to-back kinematics region. Motivated by a recent triple-coincidence measurement by FINUDA, we estimate the three-body induced decay, where we have found, Γ3/Γ2 ∼= 0.23. Our microscopic model also predicts values for the asymmetry parameter in 12 ΛC, consistent with the asymmetry measured at KEK.
Palabras clave:
Λ-HYPERNUCLEI
,
FSI
,
NON-MESONIC WEAK DECAY
,
TWO-NUCLEON INDUCED DECAY
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(CCT - LA PLATA)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - LA PLATA
Articulos(IFLP)
Articulos de INST.DE FISICA LA PLATA
Articulos de INST.DE FISICA LA PLATA
Citación
Bauer, Eduardo; Microscopic model to nucleon spectra in hypernuclear non-mesonic weak decay; Elsevier Science; Nuclear Physics A; 914; 8-1-2013; 204-208
Compartir
Altmétricas