Relativistic model for the nonmesonic weak decay of single-lambda hypernuclei

Autor(es)

Fontoura, C. E. ^[1] ; Krmpotic, F. ^{[2, 1]} ; Galeao, A. P. ^[1] ; De Conti, C. ^[3] ; Krein, G. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Paulista, Inst Fis Teor, Rua Dr Bento Teobaldo Ferraz, 271 Bloco 3, BR-01140070 Sao Paulo, SP - Brazil

^[2] Univ Nacl La Plata, Inst Fis La Plata, RA-1900 La Plata, Buenos Aires - Argentina

^[3] Univ Estadual Paulista, Campus Expt Rosana, BR-19274000 Rosana, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS; v. 43, n. 5 MAY 2016.
• Citações Web of Science: 1

Resumo

Having in mind its future extension for theoretical investigations related to charmed nuclei, we develop a relativistic formalism for the nonmesonic weak decay (NMWD) of single-Lambda hypernuclei in the framework of the independent-particle shell model and with the dynamics represented by the (pi, K) one-meson-exchange model. Numerical results for the one-nucleon-induced transition rates of C-12(Lambda) are presented and compared with those obtained in the analogous nonrelativistic calculation. There is satisfactory agreement between the two approaches, and the only noteworthy difference is that the ratio Gamma(n)/Gamma(p) is appreciably higher and closer to the experimental value in the relativistic calculation. The ability of describing existing data, including the most recent ones, on NMWD of Lambda-hypernuclei, warrants application of the formalism to evaluate similar decay processes in charmed nuclei. (AU)

• Processo FAPESP: 13/01907-0 - Centro de Pesquisa e Análise de São Paulo
• Beneficiário: Sergio Ferraz Novaes
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/01790-5 - Hipernúcleos estranhos e charmosos: estrutura e decaimento fraco
• Beneficiário: Gastão Inácio Krein
• Modalidade de apoio: Auxílio à Pesquisa - Pesquisador Visitante - Internacional