Binding of hypernuclei in the latest quark-meson coupling model
2008
8 pages
Published in:
- Nucl.Phys.A 814 (2008) 66-73
e-Print:
- 0712.1925 [nucl-th]
Report number:
- JLAB-THY-07-763,
- DAPNIA-07-194
Citations per year
Abstract: (Elsevier)
The most recent development of the quark–meson coupling (QMC) model, in which the effect of the mean scalar field in-medium on the hyperfine interaction is also included self-consistently, is used to compute the properties of hypernuclei. The calculations for Λ and Ξ hypernuclei are of comparable quality to earlier QMC results without the additional parameter needed there. Even more significantly, the additional repulsion associated with the increased hyperfine interaction in-medium completely changes the predictions for Σ hypernuclei. Whereas in the earlier work they were bound by an amount similar to Λ hypernuclei, here they are unbound, in qualitative agreement with the experimental absence of such states. The equivalent non-relativistic potential felt by the Σ is repulsive inside the nuclear interior and weakly attractive in the nuclear surface, as suggested by the analysis of Σ -atoms.- 21.65.
- 21.65.-f
- 71.25.J
- 12.39.-x
- 21.80.+a
- 24.10.Jv
- hypernucleus: finite
- shell model
- energy levels
- Lambda: hypernucleus
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