Soft-core hyperon-nucleon potentials
| dc.creator | Rijken, Th. A. | |
| dc.creator | Stoks, V. G. J. | |
| dc.creator | Yamamoto, Y. | |
| dc.date | 1998-07-31 | |
| dc.date.accessioned | 2026-07-07T11:11:48Z | |
| dc.date.available | 2026-07-07T11:11:48Z | |
| dc.description | A new Nijmegen soft-core OBE potential model is presented for the low-energy YN interactions. Besides the results for the fit to the scattering data, which largely defines the model, we also present some applications to hypernuclear systems using the G-matrix method. An important innovation with respect to the original soft-core potential is the assignment of the cut-off masses for the baryon-baryon-meson (BBM) vertices in accordance with broken SU(3)$_F$, which serves to connect the NN and the YN channels. As a novel feature, we allow for medium strong breaking of the coupling constants, using the $^3P_0$ model with a Gell-Mann--Okubo hypercharge breaking for the BBM coupling. We present six hyperon-nucleon potentials which describe the available YN cross section data equally well, but which exhibit some differences on a more detailed level. The differences are constructed such that the models encompass a range of scattering lengths in the $ΣN$ and $ΛN$ channels. For the scalar-meson mixing angle we obtained values $θ_S=37$ to 40 degrees, which points to almost ideal mixing angles for the scalar $q\bar{q}$ states. The G-matrix results indicate that the remarkably different spin-spin terms of the six potentials appear specifically in the energy spectra of $Λ$ hypernuclei. | |
| dc.description | 37 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9807082 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9807082 | |
| dc.identifier | Phys.Rev.C59:21-40,1999 | |
| dc.identifier | doi:10.1103/PhysRevC.59.21 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191219 | |
| dc.subject | Nuclear Theory | |
| dc.title | Soft-core hyperon-nucleon potentials | |
| dc.type | text |