$Λ(1520)$ and $Σ(1385)$ in the nuclear medium
| dc.creator | Kaskulov, M. | |
| dc.creator | Oset, E. | |
| dc.date | 2005-09-28 | |
| dc.date | 2005-11-23 | |
| dc.date.accessioned | 2026-07-07T10:30:43Z | |
| dc.date.available | 2026-07-07T10:30:43Z | |
| dc.description | Recent studies of the $Λ(1520)$ resonance within chiral unitary theory with coupled channels find the resonance as a dynamically generated state from the interaction of the decuplet of baryons and the octet of mesons, essentially a quasibound state of $πΣ^*(1385)$ in this case, although the coupling of the $Λ(1520)$ to the $\bar{K}N$ and $πΣ$ makes this picture only approximate. The $πΣ^*(1385)$ decay channel of the $Λ(1520)$ is forbidden in free space for the nominal mass of the $Σ^*(1385)$, but the coupling of the $π$ to $ph$ components in the nuclear medium opens new decay channels of the $Λ(1520)$ in the nucleus and produces a much larger width. Together with medium modifications of the $\bar{K}N$ and $πΣ$ decay channels, the final width of the $Λ(1520)$ at nuclear matter density is more than five times bigger than the free one. We perform the calculations by dressing simultaneously the $Λ(1520)$ and the $Σ^*(1385)$ resonances, finding moderate changes in the mass but substantial ones in the width of both resonances. | |
| dc.description | 20 pages, 6 figures; comparison made to data, new references and new (small) decay channel included | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0509088 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0509088 | |
| dc.identifier | Phys.Rev.C73:045213,2006 | |
| dc.identifier | doi:10.1103/PhysRevC.73.045213 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/178215 | |
| dc.subject | Nuclear Theory | |
| dc.title | $Λ(1520)$ and $Σ(1385)$ in the nuclear medium | |
| dc.type | text |