Towards a solution of theΓn∕Γppuzzle in the nonmesonic weak decay ofΛhypernuclei

The Nonmesonic Weak Decay of Hypernuclei

Nonmesonic weak decay of the hypertriton.

J. Golak, K. Miyagawa, H. Kamada, H. Witała, W. Glöckle, A. Parreño, A. Ramos, and C. Bennhold Institut für Theoretische Physik II, Ruhr Universität Bochum, D-44780 Bochum, Germany Institut of Physics, Jagellonian University, PL 30059 Cracow, Poland Department of Applied Physics, Okayama University of Science, Ridai-cho Okayama 700, Japan Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerla...

Models of the Nonmesonic Weak Decay

I review the current status of understanding the mechanism of the nonmesonic weak decays (NMWD) of hypernuclei. Long standing problem on the Γnn/Γpn ratio has been solved by considering short-range weak interactions properly. This leaves a few remaining problems, such as the asymmetry of the emitted proton with respect to the Λ polarization and validity of the ∆I = 1/2 in the nonmesonic weak de...

Dynamics of Hypernuclear Nonmesonic Weak Decay

Simple and coincidence spectra of the NM weak decay of light hypernuclei have been evaluated in a systematic way for the first time. We have only considered 1N induced processes, neglecting entirely the events induced by 2N emission, as well as the effects of the FSIt’s. As the theoretical frameworkwe have used the IPSMwith three different parametrizations for the transition potential. The comp...

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 ...