Non-leptonic hyperon decays in chiral perturbation theory

B. Borasoy, Barry R. Holstein
1999 European Physical Journal C: Particles and Fields  
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
more » ... 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.
doi:10.1007/s100520050323 fatcat:u5pypajxjvgzbkyhzmbasnld44