Microscopic approach to the proton asymmetry in the non-mesonic weak decay of Lambda-hypernuclei

Details Microscopic approach to the proton asymmetry in the non-mesonic weak decay of Lambda-hypernuclei Microscopic approach to the proton asymmetry in the non-mesonic weak decay of Lambda-hypernuclei

2011-12-21

arxiv.org/abs/1112.5196v1

Physics

Nuclear Physics

Nuclear Theory

Scientific paper

The non--mesonic weak decay of polarized $\Lambda$-hypernuclei is studied with a microscopic diagrammatic formalism in which one- and two-nucleon induced decay mechanisms, $\vec{\Lambda} N \to NN$ and $\vec{\Lambda} NN \to NNN$, are considered together with (and on the same ground of) nucleon final state interactions. We adopt a nuclear matter formalism extended to finite nuclei via the local density approximation. Our approach adopts different one-meson-exchange weak transition potentials, while the strong interaction effects are accounted for by a Bonn nucleon-nucleon interaction. We also consider the two-pion-exchange effect in the weak transition potential. Both the two-nucleon induced decay mechanism and the final state interactions reduce the magnitude of the asymmetry. The quantum interference terms considered in the present microscopic approach give rise to an opposite behavior of the asymmetry with increasing energy cuts to that observed in models describing the nucleon final state interactions semi-classically via the intranuclear cascade code. Our results for the asymmetry parameter in $^{12}_{\Lambda}$C obtained with different potential models are consistent with the asymmetry measured at KEK.

Affiliated with

Also associated with

No associations

Rating

Microscopic approach to the proton asymmetry in the non-mesonic weak decay of Lambda-hypernuclei 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 Microscopic approach to the proton asymmetry in the non-mesonic weak decay of Lambda-hypernuclei, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microscopic approach to the proton asymmetry in the non-mesonic weak decay of Lambda-hypernuclei will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-305705