2026-04-13T05:44:42Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/122332025-12-05T16:43:31Zcom_2072_1057col_2072_478823col_2072_478917

urn:hdl:2445/12233 Nonmesonic weak decay of the hypertriton Bennhold, Cornelius Ramos Gómez, Àngels Aruliah, D. A. Oelfke, U. Estructura nuclear Desintegració radioactiva Mesons (Física nuclear) Interaccions febles (Física nuclear) Nuclear structure Radioactive decay Mesons Weak interactions (Nuclear physics) The nonmesonic decay of the hypertriton is calculated based on a hypertriton wave function and 3N scattering states, which are rigorous solutions of three-body Faddeev equations using realistic NN and hyperon-nucleon interactions. The pion exchange together with heavier meson exchanges for the {Lambda}N{r_arrow}NN transition is considered. The total nonmesonic decay rate is found to be 0.5{percent} of the free {Lambda} decay rate. Integrated as well as differential decay rates are given. The p- and n-induced decays are discussed thoroughly and it is shown that the corresponding total rates cannot be measured individually. The nonmesonic weak decay of 3 Λ H is evaluated microscopically in the pion exchange model. The correlated three-body wave function of the hypertriton is approximated by a bound Λ-deuteron system obtained by averaging the YN interaction over the deuteron wave function. The relevant matrix elements are calculated in momentum space. The resulting decay rate is 4.9% of the free Λ decay rate. 2010-04-22T11:56:19Z 2010-04-22T11:56:19Z 1992 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Reproducció digital del document publicat en format paper, proporcionada per PROLA i http://dx.doi.org/10.1103/PhysRevC.45.947 Physical Review C, 1992, vol. 45, núm. 3, p. 947-951 http://dx.doi.org/10.1103/PhysRevC.45.947 (c) The American Physical Society, 1992 info:eu-repo/semantics/openAccess The American Physical Society Articles publicats en revistes (Física Quàntica i Astrofísica)