Radiative and nonleptonic hyperon decays in broken SU(3)
Abstract
We report on the recently proposed joint resolution of two long-standing puzzles in weak radiative (WR) and nonleptonic (NL) hyperon decays (HD). First, a good VMD-based description of WRHD is presented. In particular, the large negative asymmetry observed in the \Sigma^+ \to p \gamma decay is explained through a calculably large SU(3)-breaking effect in the relevant parity-violating amplitude. Second, the achieved description of the parity-violating WRHD amplitudes permits the extraction, via the SU(2)_W + VMD route, of the non-soft-pion correction term in the parity-violating NLHD amplitudes. The latter subtracts a substantial amount from the current-algebra commutator term, thus leading to the resolution of the old S:P discrepancy in NLHD.
Cite
@article{arxiv.hep-ph/0610191,
title = {Radiative and nonleptonic hyperon decays in broken SU(3)},
author = {P. Zenczykowski},
journal= {arXiv preprint arXiv:hep-ph/0610191},
year = {2008}
}
Comments
Talk given at 7th International Conference on Hyperons, Charm and Beauty Hadrons (BEACH2006), Lancaster, U.K., 2 - 8 July 2006, ; 4 pages, uses espcrc2.sty