Improved Coupled Channels and R-Matrix Models: Predictions to 1 Gev
| dc.creator | LaFrance, P. | |
| dc.creator | Lomon, E. L. | |
| dc.creator | Aw, M. | |
| dc.date | 1993-06-29 | |
| dc.date.accessioned | 2026-07-07T05:41:16Z | |
| dc.date.available | 2026-07-07T05:41:16Z | |
| dc.description | The $NN$ scattering near inelastic threshold is sensitive to the long-range diagonal interaction in the produced isobar channel. Earlier models included meson exchange potentials in the $NN$ sector and connecting that sector to isobar channels, as well as an $R$-matrix description of short-range quark effects. Including the diagonal pion exchange contributions in the $NΔ$ channels coupled to the very inelastic ${}^1D_2$ and ${}^3F_3$ $NN$ channels substantially improves those phase parameters and the observables $Δσ_{L}$ and $Δσ_{T}$. The same improvement is made to the other $I=1$ $NN$ channels. In the ${}^1S_0$ $NN$ channel coupling to the $ΔΔ$ channel is unusually important due to the $L=2$ angular momentum barrier in the $NΔ$ channel. The pion exchange transition potentials between isobar channels are included in this partial wave to obtain the correct equilibrium between one- and two-pion decay channels. Other improvements to earlier models have been made, in the specification of isobar channels and the inclusion of decay width effects in more channels. A comparison is made with all the $pp$ data for $T_L \le 800$~MeV, producing a very good fit over the whole energy range. | |
| dc.description | 31 pages in Plain TeX (with figures to be added using FIGURES command), MIT CTP #2133 | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9306026 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9306026 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/82512 | |
| dc.subject | Nuclear Theory | |
| dc.title | Improved Coupled Channels and R-Matrix Models: Predictions to 1 Gev | |
| dc.type | text |