In-medium chiral SU(3) dynamics and hypernuclear structure
| dc.creator | Finelli, P. | |
| dc.creator | Kaiser, N. | |
| dc.creator | Vretenar, D. | |
| dc.creator | Weise, W. | |
| dc.date | 2007-07-23 | |
| dc.date | 2007-12-10 | |
| dc.date.accessioned | 2026-07-07T10:56:53Z | |
| dc.date.available | 2026-07-07T10:56:53Z | |
| dc.description | A previously introduced relativistic energy density functional, successfully applied to ordinary nuclei, is extended to hypernuclei. The density-dependent mean field and the spin-orbit potential are consistently calculated for a $Λ$ hyperon in the nucleus using the SU(3) extension of in-medium chiral perturbation theory. The leading long range $ΛN$ interaction arises from kaon-exchange and $2π$-exchange with $Σ$ hyperon in the intermediate state. Scalar and vector mean fields reflecting in-medium changes of the quark condensates are constrained by QCD sum rules. The model, applied to oxygen as a test case, describes spectroscopic data in good agreement with experiment. In particular, the smallness of the $Λ$ spin-orbit interaction finds a natural explanation in terms of an almost complete cancellation between scalar-vector background contributions and long-range terms generated by two-pion exchange. | |
| dc.description | 10 pages, 2 figures, elsart class. Minor revisions | |
| dc.identifier | https://arxiv.org/abs/0707.3389 | |
| dc.identifier | http://arxiv.org/abs/0707.3389 | |
| dc.identifier | Phys.Lett.B658:90-94,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2007.09.070 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/186566 | |
| dc.subject | Nuclear Theory | |
| dc.title | In-medium chiral SU(3) dynamics and hypernuclear structure | |
| dc.type | text |