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arXiv · hep-ph/9810201

|Delta I|=3/2 Decays of the Omega^- in Chiral Perturbation Theory

Jusak Tandean·G. Valencia
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Abstract

We study the decays Omega^- -> Cascade+pion using heavy-baryon chiral perturbation theory to quantify the |Delta I|=1/2 rule in these decay modes. The ratio of |Delta I|=3/2 to |Delta I|=1/2 amplitudes is somewhat larger in these decays than it is in other hyperon decays. At leading order there are two operators responsible for the |Delta I|=3/2 parts of the Omega^- decays which also contribute at one loop to other hyperon decays. These one-loop contributions are sufficiently large to indicate (albeit not definitely) that the measured width ratio of Omega^-->Cascade^0+pion^- to Omega^-->Cascade^-+pion^0 = 2.7 may be too large.

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Jusak Tandean, G. Valencia. 1998-10-01. |Delta I|=3/2 Decays of the Omega^- in Chiral Perturbation Theory. https://doi.org/10.1016/s0370-2693(99)00277-4

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