ar X iv : h ep - p h / 05 10 17 7 v 2 3 N ov 2 00 5 Hyperon Semileptonic Decays and CKM Unitarity ∗
نویسنده
چکیده
We perform a new numerical analysis of hyperon semileptonic decays emphasizing the systematic uncertainties. The poor understanding of SU(3) symmetry breaking effects at second order in the vector form factor translates into a large error of |Vus|. Using our determination |Vus| = 0.226 ± 0.005 together with those coming from other sources we test the unitarity of the CKM matrix.
منابع مشابه
ar X iv : h ep - p h / 97 12 35 6 v 1 1 2 D ec 1 99 7 Determination of the CKM matrix by semileptonic rare B - decays ∗
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تاریخ انتشار 2005