KbarN interaction and Kaons in the nuclear medium
| dc.creator | Ramos, A. | |
| dc.creator | Oset, E. | |
| dc.date | 1998-10-05 | |
| dc.date.accessioned | 2026-07-07T05:42:39Z | |
| dc.date.available | 2026-07-07T05:42:39Z | |
| dc.description | The s-wave meson-nucleon interaction in the S=-1 sector is studied by means of a coupled-channel Lippmann Schwinger equation, using the lowest order chiral Lagrangian and a cut off to regularize the loop integrals. The position and width of the Lambda(1405) resonance and the K^- p scattering cross sections at low energies are well reproduced. The inclusion of the eta Lambda, eta Sigma^0 channels in the coupled system is found very important and allows a solution in terms of only the lowest order Lagrangian. The model is applied to calculate the in-medium K^- self-energy to which we add a small p-wave piece resulting from the coupling to hyperon particle-nucleon hole excitations. The K^- feels an attraction of about -100 MeV at normal nuclear density. The Lambda(1405) resonance shifts to energies above the $K^-p$ threshold and ends up dissolving as density increases. It remains to be seen how these effects persist when the dressing of the Kbar and the pi mesons is incorporated self-consistently in the calculation. | |
| dc.description | 14 pages, 6 figures, talk presented at "Mesons and Light Nuclei", Pruhonice (Prague), Aug.31-Sep.4 (1998), to appear in the proceedings | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9810014 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9810014 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/83015 | |
| dc.subject | Nuclear Theory | |
| dc.title | KbarN interaction and Kaons in the nuclear medium | |
| dc.type | text |