Nonmesonic Hyperon Weak Decay Spectra in 12C

I. GONZALEZ; A. DEPPMAN; S. DUARTE; F. KRMPOTIC; M.S. HUSSEIN; C. BARBERO

JOURNAL OF PHYSICS: CONFERENCE SERIES

IOP PUBLISHING LTD

Año: 2011 vol. 312 p. 1 - 6

1742-6588

We study the nonmesonic weak decay (NMWD) ¤N ! nN of the 12C hypernucleus induced by the nucleon N = n; p with transition rate ¡N. The nuclear process is described by the interplay of two models; one describing the NMWD of hyperon ¤ in the nuclear environment, and the other taking into account the Final State Interaction (FSI) of the two outgoing nucleons with the residual nucleus. The ¯rst one is done in the framework of the Independent-Particle Shell-Model (IPSM), with the decay dynamics represented by the exchange of ¼+´+K+½+!+K¤ mesons with usual parametrization. For the second one is used a time dependent multicollisional intranuclear cascade schema (implemented in the CRISP code - Collaboration Rio-S~ao Paulo). The results obtained for inclusive and exclusive kinetic energy spectra, and the angular correlation are compared with recent data from KEK and FINUDA experiments. The calculated ratio (¡n=¡p)FSI, between the numbers of emitted back-to-back nn and np pairs, is in good agreement with the experimental data.