On the width of Σ hypernuclei and Σ- atoms
Abstract
The self-energy of a Σ particle in symmetric nuclear matter is investigated by using a boson exchange model for the ΣN interaction. The imaginary part of the self-energy is shown to be strongly density dependent and has saturation properties around ϱ ≌ 0.7 ϱo. This peculiar feature allows our results to be in good agreement with the Σ atom data while simultaneously providing a width of about 5 Mev or smaller for all nuclei and different states.
Permanent address: Departamento de Física Atómica y Nuclear, Facultad de Ciencias, Universidad de Salamanca, Salamanca, Spain.- Publication:
-
Physics Letters B
- Pub Date:
- December 1982
- DOI:
- 10.1016/0370-2693(82)90596-2
- Bibcode:
- 1982PhLB..118...33B