Delta I=3/2 Decays of Hyperons in Chiral Perturbation Theory
Abstract
We study the Delta I=3/2 amplitudes of the octethyperon decays B > B' + pion and of the decays Omega^ > Cascade + pion in the context of heavybaryon chiral perturbation theory. For the octethyperon decays, we investigate the theoretical uncertainty of the lowestorder predictions by calculating the leading nonanalytic corrections. We find that these corrections are within the expectations of naive power counting and, therefore, that this picture can be tested more accurately with improved measurements. For the Omega decays, we obtain at leading order two operators responsible for the decays which also contribute at one loop to the octethyperon decays. These oneloop contributions are sufficiently large to suggest that the ratio of measured widths of Omega^ > Cascade0 + pion to Omega^ > Cascade + pion0 being approximately equal to 2.7 may be too large.
 Publication:

arXiv eprints
 Pub Date:
 February 1999
 arXiv:
 arXiv:hepph/9902433
 Bibcode:
 1999hep.ph....2433T
 Keywords:

 High Energy Physics  Phenomenology
 EPrint:
 6 pages, RevTeX