Semileptonic Hyperon Decays
| dc.creator | Cabibbo, Nicola | |
| dc.creator | Swallow, Earl C. | |
| dc.creator | Winston, Roland | |
| dc.date | 2003-07-23 | |
| dc.date.accessioned | 2026-07-07T11:31:27Z | |
| dc.date.available | 2026-07-07T11:31:27Z | |
| dc.description | We review the status of hyperon semileptonic decays. The central issue is the $V_{us}$ element of the CKM matrix, where we obtain $V_{us}=0.2250 (27)$. This value is of similar precision, but higher, than the one derived from $K_{l3}$, and in better agreement with the unitarity requirement, $|V_{ud}|^2+|V_{us}|^2+|V_{ub}|^2=1$. We find that the Cabibbo model gives an excellent fit of the existing form factor data on baryon beta decays ($χ^{2} = 2.96$ for 3 degrees of freedom) with $F + D = 1.2670 \pm 0.0030$, $F - D = -0.341 \pm 0.016$, and no indication of flavour-SU(3)-breaking effects. We indicate the need of more experimental and theoretical work, both on hyperon beta decays and on $K_{l3}$ decays. | |
| dc.description | 37 pages, 8 figures, 4 tables, Final version of this material is scheduled to appear in the Annual Review of Nuclear and Particle Science Vol. 53 | |
| dc.identifier | https://arxiv.org/abs/hep-ph/0307298 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/0307298 | |
| dc.identifier | Ann.Rev.Nucl.Part.Sci.53:39-75,2003 | |
| dc.identifier | doi:10.1146/annurev.nucl.53.013103.155258 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/197272 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.subject | High Energy Physics - Experiment | |
| dc.title | Semileptonic Hyperon Decays | |
| dc.type | text |