Strangeness-changing nonlepton decays of the kaons, hyperons, and the Ω− particle

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Abstract
We try to understand the strangeness changing nonleptonic decays of kaons, hyperons, and the Ω− particle in terms of the modern, renormalized weak Hamiltonian expressed as a sum of four-quark Wilson operators, including the so-called penguin operators c5O5 and c6O6 arising from gluon radiative corrections. It is found that these decays, including the long-standing s-wave/p-wave puzzle in hyperon decays, can be understood if the Wilson coefficient has a sign opposite to that obtained from short-distance perturbative quantum chromodynamics calculations and has an effective value such that .

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