Note on the Effective Hamiltonian of Nonleptonic Hyperon Decays
نویسندگان
چکیده
منابع مشابه
Role of resonances in nonleptonic hyperon decays
We examine the importance of resonances for the non–leptonic hyperon decays in the framework of chiral perturbation theory. Lower lying resonances are included into the effective theory. Integrating out the heavy degrees of freedom in the resonance saturation scheme generates higher order counterterms in the effective Lagrangian, providing an estimate of the pertinent coupling constants. A fit ...
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The sum of the CP -violating asymmetries A(Λ−) and A(Ξ − −) in hyperon nonleptonic decays is presently being measured by the E871 experiment. We evaluate contributions to the asymmetries induced by chromomagnetic-penguin operators, whose coefficients can be enhanced in certain models of new physics. Incorporating recent information on the strong phases in Ξ → Λπ decay, we show that new-physics ...
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We recalculate the leading nonanalytic contributions to the amplitudes for hyperon nonleptonic decays in chiral perturbation theory. Our results partially disagree with those calculated before, and include new terms previously omitted in the P-wave amplitudes. Although these modifications are numerically significant, they do not change the well-known fact that good agreement with experiment can...
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ژورنال
عنوان ژورنال: Progress of Theoretical Physics
سال: 1968
ISSN: 0033-068X,1347-4081
DOI: 10.1143/ptp.40.898