Non-leptonic hyperon decays in chiral perturbation theory

Details Non-leptonic hyperon decays in chiral perturbation theory Non-leptonic hyperon decays in chiral perturbation theory

1998-05-22

arxiv.org/abs/hep-ph/9805430v1

Eur.Phys.J.C6:85-107,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

40 pages, 4 figures

Scientific paper

10.1007/s100520050323

The non-leptonic hyperon decays are analyzed up to one-loop order including all counterterms in the framework of heavy baryon chiral perturbation theory. We use the exchange of the spin-3/2 decuplet resonances as an indication of which low-energy constants contribute significantly to these investigated processes . We choose four independent decay amplitudes that are not related by isospin relations in order to perform a fit for the pertinent low-energy constants and find a satisfactory fit both for s- and p-waves. The chiral corrections to the lowest order forms for the s-waves are moderate whereas there are significant modifications of the p-wave amplitudes.

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