$SU(3)$ vs. $SU(3) \times SU(3)$ Breaking in Weak Hyperon Decays
| dc.creator | Luty, Markus A. | |
| dc.creator | White, Martin | |
| dc.date | 1993-04-23 | |
| dc.date | 1993-04-24 | |
| dc.date.accessioned | 2026-07-07T08:59:50Z | |
| dc.date.available | 2026-07-07T08:59:50Z | |
| dc.description | We consider the predictions of chiral perturbation theory for $SU(3)$ breaking in weak semileptonic and $s$-wave nonleptonic hyperon decays. By defining an expansion sensitive only to $SU(3)$ breaking, we show that the leading corrections give rise to moderate corrections to $SU(3)$ relations ($\lsim 20\%$), even though the {\it chiral} symmetry $SU(3) \times SU(3)$ appears to be rather badly broken. This explains why $SU(3)$ fits to weak hyperon decays work well even though chiral-symmetry breaking corrections are large. Applying these $SU(3)$-breaking corrections to the analysis of the EMC data, we find that the predicted value of $\bra p\mybar sγ_μγ_5 s\ket p$ is reduced by $\simeq 35\%$, suggesting that the ``EMC effect'' may be less striking than commonly thought. | |
| dc.description | 15 pages, LBL-33993/CfPA-TH-93-09. (Eliminated multiple fonts in title; some versions of TeX apparently cannot handle this. No change in text.) | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9304291 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9304291 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/147857 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | $SU(3)$ vs. $SU(3) \times SU(3)$ Breaking in Weak Hyperon Decays | |
| dc.type | text |