Hyperon Semileptonic Decays and CKM Unitarity

Details Hyperon Semileptonic Decays and CKM Unitarity Hyperon Semileptonic Decays and CKM Unitarity

2005-10-13

arxiv.org/abs/hep-ph/0510177v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, no figures. Talk given at the High-Energy Physics International Conference on Quantum Chromodynamics, 2-9 July (2005)

Scientific paper

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 |V(us)|. Using our determination |V(us)| = 0.226 +/- 0.005 together with those coming from other sources we test the unitarity of the CKM matrix.

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