Joint description of weak radiative and nonleptonic hyperon decays in broken SU(3)
| dc.creator | Zenczykowski, P. | |
| dc.date | 2005-12-09 | |
| dc.date | 2006-01-26 | |
| dc.date.accessioned | 2026-07-07T10:44:29Z | |
| dc.date.available | 2026-07-07T10:44:29Z | |
| dc.description | We give a joint description of weak radiative (WR) and nonleptonic (NL) hyperon decays (HD) in broken SU(3). The two groups of decays are linked via $SU(2)_W$ spin symmetry and vector meson dominance (VMD). We use experimental information on the parity-conserving (p.c.) NLHD amplitudes to fix the corresponding WRHD amplitudes. With the latter known, the data on the WRHD branching ratios and asymmetries permit us to determine the parity-violating (p.v.) WRHD amplitudes in terms of two parameters corresponding to the two-quark and single-quark transitions. We obtain a good description of the data, and in particular a large $Σ^+ \to p γ$ asymmetry. Then, using the $SU(2)_W$+VMD route we determine the non-soft-meson correction term in the p.v. NLHD amplitudes. The latter is shown to subtract a substantial amount from the current-algebra commutator thus leading towards the resolution of the S:P discrepancy in NLHD. | |
| dc.description | 26 pages | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0512122 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0512122 | |
| dc.identifier | Phys.Rev.D73:076005,2006 | |
| dc.identifier | doi:10.1103/PhysRevD.73.076005 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/182608 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Joint description of weak radiative and nonleptonic hyperon decays in broken SU(3) | |
| dc.type | text |