Hypernuclei and in-medium chiral dynamics
| dc.creator | Finelli, P. | |
| dc.date | 2007-09-14 | |
| dc.date.accessioned | 2026-07-07T11:37:12Z | |
| dc.date.available | 2026-07-07T11:37:12Z | |
| dc.description | A recently introduced relativistic nuclear energy density functional, constrained by features of low-energy QCD, is extended to describe the structure of hypernuclei. The density-dependent mean field and the spin-orbit potential of a $Λ$-hyperon in a nucleus, are consistently calculated 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 a $Σ$-hyperon in the intermediate state. Scalar and vector mean fields, originating from in-medium changes of the quark condensates, produce a sizeable {\em short-range} spin-orbit interaction. The model, when applied to oxygen as a test case, provides a natural explanation for the smallness of the effective $Λ$ spin-orbit potential: an almost complete cancellation between the background contributions (scalar and vector) and the long-range terms generated by two-pion exchange. | |
| dc.description | 8 pages and 6 figures. To appear in the proceedings of the Theoretical nuclear physics school "Exotic Nuclei: New Challenges", Les Houches (France) May 7-18, 2007 | |
| dc.identifier | https://arxiv.org/abs/0709.2298 | |
| dc.identifier | http://arxiv.org/abs/0709.2298 | |
| dc.identifier | Eur.Phys.J.ST156:183-190,2008 | |
| dc.identifier | doi:10.1140/epjst/e2008-00615-1 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/199123 | |
| dc.subject | Nuclear Theory | |
| dc.title | Hypernuclei and in-medium chiral dynamics | |
| dc.type | text |