English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

The non-mesonic weak decay of $\Lambda$-hypernuclei is studied within amicroscopic diagrammatic approach which includes, for the first time, theeffect or the $\Delta$-baryon resonance. We adopt a nuclear matter formalismextended to finite nuclei via the local density approximation, a one-mesonexchange weak transition potential, a Bonn nucleon-nucleon strong potential anda $\Delta N\to NN$ strong potential based on the Landau-Migdal theory. Groundstate correlations and final state interactions (FSI), at second order in thebaryon-baryon strong interaction, are introduced on the same footing for allthe isospin channels of one- and two-nucleon induced decays. Weak decay ratesand single and double-coincidence nucleon spectra are predicted for$^{12}_\Lambda$C and compared with recent KEK and FINUDA data. The$\Delta(1232)$ introduces new FSI-induced decay mechanisms which lead to animprovement when comparing the obtained nucleon spectra with data, while itturns out to have a negligible effect on the decay rates. Discrepancies withexperiment remain only for emission spectra involving protons, but are mostlyrestricted to double-nucleon correlations in the non-back-to-back kinematics.

On the effect of the Delta(1232) in hypernuclear non-mesonic weak decay: a microscopic approach