The role of $Δ^{++*}(1620)$ resonances in $pp \to nK^+Σ^+$ reaction and its important implications
| dc.creator | Xie, J. J. | |
| dc.creator | Zou, B. S. | |
| dc.date | 2007-01-09 | |
| dc.date.accessioned | 2026-07-07T11:23:59Z | |
| dc.date.available | 2026-07-07T11:23:59Z | |
| dc.description | The $pp \to nK^+Σ^+$ reaction is a very good isospin 3/2 filter for studying $Δ^{++*}$ decaying to $K^+Σ^+$. With an effective Lagrangian approach, contributions from a previous ignored sub-$K^+Σ^+$-threshold resonance $Δ^{++*}(1620)1/2^-$ are fully included in addition to those already considered in previous calculations. It is found that the $Δ^{++*}(1620)1/2^-$ resonance gives an overwhelmingly dominant contribution for energies very close to threshold, with a very important contribution from the t-channel $ρ$ exchange. This solves the problem that all previous calculations seriously underestimate the near-threshold cross section by order(s) of magnitude. Many important implications of the results are discussed. | |
| dc.description | 11 pages, 3 figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/0701021 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/0701021 | |
| dc.identifier | Phys.Lett.B649:405-412,2007 | |
| dc.identifier | doi:10.1016/j.physletb.2007.04.035 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/195077 | |
| dc.subject | Nuclear Theory | |
| dc.title | The role of $Δ^{++*}(1620)$ resonances in $pp \to nK^+Σ^+$ reaction and its important implications | |
| dc.type | text |