Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-10-06
Physics
Nuclear Physics
Nuclear Theory
Changing content, 8 pages, 2 figures, 2 tables, submitted to Phys. Rev. C
Scientific paper
We develop a theoretical framework for the evaluation of the coincidence number of pairs, $N_{nN}$, and the asymmetry parameter, $a_\Lambda$, in nonmesonic hypernuclear decay $\Lambda N\rightarrow nN$. The primary nomesonic weak hyperon-nucleon decay process is described through the independent particle shell model. When the effect of the strong interactions experimented by the two nucleons leaving the residual nucleus is included, we have in addition to the $2p1h$ primary configuration $2p'1h'$, $3p2h$, $4p3h$, $\cdots$, etc secondary ones. We work within the $2p'1h'$ subspace of final states assuming a simple approach for finite nuclei based on the eikonal approximation. An optical potential including the nucleon-nucleus isoscalar and isovector interaction is introduced to take into account the minimum nuclear medium effects and to describe the nucleon-nucleus dispersion process along the outgoing path. We applied the proposed description to the calculation of the observables in $^{5}_\Lambda He$ and $^{12}_\Lambda C$ nonmesonic decays. The calculated results show that our treatment of FSI even considered as restricted to a subspace of states gives a good agreement with experimental data, similar to that ones presented by more elaborated evaluations. This indicates that the developed theoretical scheme seems to be appropriated to include more complex configurations. We also discuss the ground state normalization effects at the moment of including the two-nucleon induced decay ($\Lambda NN \rightarrow nNN$) contribution.
Barbero Cesar
Duarte S. B.
Mariano Albert
No associations
LandOfFree
Evaluation of coincidence number of pairs and asymmetry parameter in nonmesonic hypernuclear decay does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Evaluation of coincidence number of pairs and asymmetry parameter in nonmesonic hypernuclear decay, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evaluation of coincidence number of pairs and asymmetry parameter in nonmesonic hypernuclear decay will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-35431