Weak radiative hyperon decays

Abstract

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.

5 pages, uses espcrc2.sty; invited talk at the 5th International Conference on Hyperons, Charm and Beauty Hadrons (BEACH2002), University of british Columbia, Vancouver, June 25-29,2002

References in corpus (1)

• Weak Radiative Hyperon Decays in Chiral Perturbation Theory

Cited by in corpus (1)

• Hyperon Weak Radiative Decay