Determination of the Kobayashi-Maskawa-Cabibbo matrix element V_{us} under various flavor-symmetry-breaking models in hyperon semileptonic decays

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dc.creatorFlores-Mendieta, R.
dc.creatorGarcia, A.
dc.creatorSanchez-Colon, G.
dc.date1996-03-09
dc.date1998-03-14
dc.date.accessioned2026-07-07T11:47:45Z
dc.date.available2026-07-07T11:47:45Z
dc.descriptionWe study the success to describe hyperon semileptonic decays of four models that incorporate second-order SU(3) symmetry breaking corrections. The criteria to assess their success is by determining V_{us} in each of the three relevant hyperon semileptonic decays and comparing the values obtained with one another and also with the one that comes from K_{l3} decays. A strong dependence on the particular symmetry breaking model is observed. Values of V_{us} which do not agree with the one of K_{l3} are generally obtained. However, in the context of chiral perturbation theory, only the model whose corrections are O(m_s) and O(m_s^{3/2}) is successful. Using its predictions for the f_1 form factors one can quote a value of V_{us} from this model, namely, V_{us}=0.2176\pm 0.0026, which is in excellent agreement with the K_{l3} one.
dc.descriptionFinal version
dc.identifierhttps://arxiv.org/abs/hep-ph/9603256
dc.identifierhttp://arxiv.org/abs/hep-ph/9603256
dc.identifierPhys.Rev.D54:6855-6860,1996
dc.identifierdoi:10.1103/PhysRevD.54.6855
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202684
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDetermination of the Kobayashi-Maskawa-Cabibbo matrix element V_{us} under various flavor-symmetry-breaking models in hyperon semileptonic decays
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