Theory of Weak Hypernuclear Decay
نویسندگان
چکیده
منابع مشابه
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...
متن کاملRelativistic Treatment of Hypernuclear Decay
We compute for the first time the decay width of Λ-hypernuclei in a relativistic mean-field approximation to the Walecka model. Due to the small mass difference between the Λ-hyperon and its decay products—a nucleon and a pion—the mesonic component of the decay is strongly Pauli blocked in the nuclear medium. Thus, the in-medium decay becomes dominated by the non-mesonic, or two-body, component...
متن کاملFinal State Interactions in Hypernuclear Decay
We present an update of the One-Meson-Exchange (OME) results for the weak decay of sand p-shell hypernuclei [1], paying special attention to the role played by final state interactions between the emitted nucleons. The present study also corrects for a mistake in the inclusion of the K and K exchange mechanisms, which substantially increases the ratio of neutroninduced to proton-induced transit...
متن کاملMass – dependence of the Λ hypernuclear decay widths
Two different approaches have been employed for the evaluation of the decay widths of Λ–hypernuclei (ranging from 5 Λ He to 208 Λ Pb) with the polarization propagator method. In ref. [1], the two–nucleon stimulated non–mesonic decay, ΛNN → NNN, has been parameterized phenomenologically by means of data on the pion–nucleus optical potential. The other approach [2] consisted in a fully microscopi...
متن کامل0 Chiral symmetry and meson exchange approach to hypernuclear decay
We take an approach to the Λ nonmesonic weak decay in nuclei based on the exchange of mesons under the guidelines of chiral Lagrangians. The one pion and one kaon exchange are considered, together with the exchange of two pions, either correlated, leading to an important scalar-isoscalar exchange (σ-like exchange), or uncorrelated (box diagrams). A drastic reduction of the OPE results for the Γ...
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ژورنال
عنوان ژورنال: Annals of Physics
سال: 1996
ISSN: 0003-4916
DOI: 10.1006/aphy.1996.0067