Delta I=3/2 and Delta S =2 Hyperon Decays in Chiral Perturbation Theory

Details Delta I=3/2 and Delta S =2 Hyperon Decays in Chiral Perturbation Theory Delta I=3/2 and Delta S =2 Hyperon Decays in Chiral Perturbation Theory

1997-05-29

arxiv.org/abs/hep-ph/9705462v1

Phys.Lett. B409 (1997) 469-473; Erratum-ibid. B418 (1998) 443

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, Latex

Scientific paper

10.1016/S0370-2693(97)00904-0

We study the Delta I =3/2 and Delta S =2 amplitudes for hyperon decays of the form (B to B(prime) pion) at lowest order in chiral perturbation theory. At this order, the Delta I=3/2 amplitudes depend on only one constant. We extract the value of this constant from experiment and find a reasonable description of these processes within experimental errors. The same constant determines the Delta S =2 transitions which, in the standard model, are too small to be observed. We find that new physics with parity odd Delta S=2 interactions can produce observable rates in hyperon decays while evading the bounds from K0 - K0(bar) mixing.

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