Two- and Three-Body Mechanisms in Nonmesonic Weak Decays of s-Shell Hypernuclei

The Nonmesonic Weak Decay of Hypernuclei

Nonmesonic Weak Decay of Light Hypernuclei with Coherent Σ Mixing

Nonmesonic weak decays of the A = 4, and 5 hypernuclei are studied. The short range parts of the hyperon-nucleon weak interactions are described by the direct quark (DQ) weak transition potential, while the longer range interactions are given by the π and K meson exchange processes. Virtual Σ mixings of the coherent type are found to give significant effects on the decay rates of 4ΛHe. A large ...

Asymmetries in the Nonmesonic Weak Decay of Polarized Hypernuclei

0031-9007= The nonmesonic weak decay of polarized hypernuclei is studied for the first time by taking into account, with a Monte Carlo intranuclear cascade code, the nucleon final state interactions. A one-mesonexchange model is employed to describe the ~ N ! nN processes in a finite nucleus framework. The relationship between the intrinsic asymmetry parameter a and the asymmetry aM accessible ...

Weak decays of medium and heavy L hypernuclei

We have made a new evaluation of the L decay width in nuclear matter within the propagator method. Through the local density approximation it is possible to obtain results in finite nuclei. We have also studied the dependence of the widths on the NN and LN strong short-range correlations. Using reasonable values for the parameters that control these correlations, as well as realistic nuclear de...

Microscopic approach to the proton asymmetry in the nonmesonic weak decay of hypernuclei

E. Bauer,1 G. Garbarino,2 A. Parreño,3 and A. Ramos3 1Departamento de Fı́sica, Universidad Nacional de La Plata, C.C. 67, and IFLP, CONICET, La Plata, Argentina 2Dipartimento di Fisica Teorica, Università di Torino and INFN, Sezione di Torino, I-10125 Torino, Italy 3Departament d’Estructura i Constituents de la Matèria, Universitat de Barcelona, E-08028 Barcelona, Spain (Received 21 December 201...