S-wave nonleptonic hyperon decays andΞb−→π−Λb
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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We calculate the total and differential decay rates for the semi-inclusive nonleptonic decays B → D s Xq (q = c or u) under the factorization hypothesis. The initial bound state effect is treated using the light-cone expansion and the heavy quark effective theory. We investigate the contribution of the penguin amplitude for the decay mode B → D s Xc and find that it is small but non-negligible....
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2016
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.93.034020