Nonmesonic weak decay spectra of light hypernuclei

Abstract

The nonmesonic weak decay spectra of light hypernuclei have been evaluated in a systematic way. As theoretical framework we adopt the independent particle shell model with three different one-meson-exchange transition potentials. Good agreement with data is obtained for proton and neutron kinetic energy spectra of ${}_{\Lambda }^4$He, and ${}_{\Lambda }^5$He, when the recoil effect is considered. The coincidence spectra of proton-neutron pairs are also accounted for quite reasonably, but it was not possible to reproduce the data for the neutron-neutron pair spectra. It is suggested that the $\pi +K$ meson-exchange model with soft monopole form factors could be a good starting point for describing the dynamics responsible for the decays of these two hypernuclei. The ${}_{\Lambda }^4$H~ spectra are also presented.

11 pages, 4 figures

References in corpus (9)

• Four-body calculation of proton-3He scattering
• Five-body cluster structure of double-$\Lambda$ hypernucleus ${}_{\Lambda \Lambda }^{11}$Be
• Neutron-${}^3$H scattering above the four-nucleon breakup threshold
• New results on Mesonic Weak Decay of $p$-shell $\Lambda$-Hypernuclei
• Exchange terms in the two--nucleon induced non--mesonic weak decay of $\Lambda$--hypernuclei
• Ground state normalization in the nonmesonic weak decay of ${}_{\Lambda }^{12}C$ hypernucleus within a nuclear matter formalism
• Kinetic energy sum spectra in nonmesonic weak decay of hypernuclei
• s-Wave Approximation for Asymmetry in Nonmesonic Decay of Finite Hypernuclei
• Nonmesonic weak decay spectra of ${}_{\Lambda }^4$He

Cited by in corpus (2)

• Nonmesonic Weak Decay Dynamics from proton spectra of $\Lambda$-Hypernuclei
• Nonmesonic weak decay of charmed hypernuclei