Hyperon Beta-Decay Analysis and the Recent KTeV Data
Abstract
The analysis of hyperon semi-leptonic decay data is addressed with reference to SU(3) breaking and isospin mixing between Lambda^O and Sigma^O. Various approaches to SU(3) breaking are discussed and compared. The phenomenological implications of Lambda^0-Sigma^0 mixing are not to be underestimated: it can induce vector couplings in decays otherwise purely axial and may also modify rates. In regard of the KTeV data on Xi^0O -> Sigma^+ e antineutrino, predictions are presented and the impact of present a future data on the extraction of F and D is also examined. In addition, the implications of the new data for the use of octet baryon beta decays in determining V_us are considered.
Cite
@article{arxiv.hep-ph/0012133,
title = {Hyperon Beta-Decay Analysis and the Recent KTeV Data},
author = {Philip G. Ratcliffe},
journal= {arXiv preprint arXiv:hep-ph/0012133},
year = {2009}
}
Comments
5 pages, uses aipproc.cls, aipproc.sty (included), axodraw.sty, cite.sty. Presented at SPIN 2000 (Osaka, Oct. 2000)