ﻻ يوجد ملخص باللغة العربية
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 $pi$ and $K$ meson exchange processes. Virtual $Sigma$ mixings of the coherent type are found to give significant effects on the decay rates of $^4_{Lambda}{rm He}$. A large violation of the $Delta I = 1/2$ rule is predicted in the J=0 transition amplitudes.
Having in mind its future extension for theoretical investigations related to charmed nuclei, we develop a relativistic formalism for the nonmesonic weak decay of single-$Lambda$ hypernuclei in the framework of the independent-particle shell model an
The nonmesonic weak decay of $Lambda$ hypernuclei is studied within a microscopic diagrammatic approach which is extended to include the three--nucleon induced mechanism. We adopt a nuclear matter formalism which, through the local density approximat
We have measured the energy spectra of pions and protons emitted in the weak decay of 12_Lambda_C, 28_Lambda_Si, and Lambda_Fe hypernuclei produced via the (pi+, K+) reaction. The decay widths of the pi- mesonic decay (Lambda -> p + pi-) and the nonm
The nonmesonic decay of $Lambda$-hypernuclei provides access to the nonleptonic weak decay process $Lambda N to NN$, which is achievable only through the observation of hypernuclear ground-state decays. We continue the discussion of some specific cas
To comprehend the recent Brookhaven National Laboratory experiment E788 on $^4_Lambda$He, we have outlined a simple theoretical framework, based on the independent-particle shell model, for the one-nucleon-induced nonmesonic weak decay spectra. Basic