Weak radiative hyperon decays

Details Weak radiative hyperon decays Weak radiative hyperon decays

2002-07-16

arxiv.org/abs/hep-ph/0207193v1

Nucl.Phys.Proc.Suppl. 115 (2003) 24-28

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, uses espcrc2.sty; invited talk at the 5th International Conference on Hyperons, Charm and Beauty Hadrons (BEACH2002),

Scientific paper

10.1016/S0920-5632(02)01946-1

The problem of weak radiative hyperon decays (WRHD) is reviewed. With the recent measurement of the $\Xi ^0 \to \Lambda \gamma$ asymmetry confirming Hara's theorem, implications from its violation in low-energy theoretical approaches are discussed. It is shown how an underlying symmetry link should be formulated for a successful description of both nonleptonic and radiative weak hyperon decays. The sign of the $\Xi ^0 \to \Lambda \gamma$ asymmetry and the overall size of parity-violating WRHD amplitudes together lead to the resolution of the old S:P problem in nonleptonic decays.

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