Three-body decay of the d* dibaryon
| dc.creator | Wong, Chun Wa | |
| dc.date | 1998-06-23 | |
| dc.date.accessioned | 2026-07-07T11:11:45Z | |
| dc.date.available | 2026-07-07T11:11:45Z | |
| dc.description | Under certain circumstances, a three-body decay width can be approximated by an integral involving a product of two off-shell two-body decay widths. This ``angle-average'' approximation is used to calculate the $πNN$ decay width of the $d^*(J^π=3^+, T=0)$ dibaryon in a simple $Δ^2$ model for the most important Feynman diagrams describing pion emissions with baryon-baryon recoil and meson retardation. The decay width is found to be about 0.006 (0.07, 0.5) MeV at the $d^*$ mass of 2065 (2100, 2150) MeV for input dynamics derived from the Full Bonn potential. The smallness of this width is qualitatively understood as the result of the three-body decay being ``third forbidden''. The concept of $\ell$ forbiddenness and the threshold behavior of a three-body decay are further studied in connection with the $πNN$ decay of the dibaryon $d'(J^π=0^-, T=0 or 2)$ where the idea of unfavorness has to be introduced. The implications of these results are briefly discussed. | |
| dc.description | 15 pages, RevTeX, two-column journal style, six figures | |
| dc.identifier | https://arxiv.org/abs/nucl-th/9806071 | |
| dc.identifier | http://arxiv.org/abs/nucl-th/9806071 | |
| dc.identifier | Phys.Rev.C58:2414-2428,1998 | |
| dc.identifier | doi:10.1103/PhysRevC.58.2414 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/191201 | |
| dc.subject | Nuclear Theory | |
| dc.title | Three-body decay of the d* dibaryon | |
| dc.type | text |