Determination of |V_us| from hadronic tau decays

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dc.creatorGamiz, E.
dc.creatorJamin, M.
dc.creatorPich, A.
dc.creatorPrades, J.
dc.creatorSchwab, F.
dc.date2005-05-13
dc.date.accessioned2026-07-07T03:54:54Z
dc.date.available2026-07-07T03:54:54Z
dc.descriptionThe recent update of the strange spectral function and the moments of the invariant mass distribution by the OPAL collaboration from hadronic tau decay data are employed to determine |V_us| as well as m_s. Our result, |V_us|=0.2208\pm0.0034, is competitive to the standard extraction of |V_us| from K_e3 decays and to the new proposals to determine it. Furthermore, the error associated to our determination of |V_us| can be reduced in the future since it is dominated by the experimental uncertainty that will be eventually much improved by the B-factories hadronic tau data. Another improvement that can be performed is the simultaneous fit of both |V_us| and m_s to a set of moments of the hadronic tau decays invariant mass distribution, which will provide even a more accurate determination of both parameters.
dc.description6 pages. Invited talk given by E.G. at the XXXXth Rencontres de Moriond on Electroweak Interactions and Unified Theories, La Thuile, Italy, 5-12 Mar 2005
dc.identifierhttps://arxiv.org/abs/hep-ph/0505122
dc.identifierhttp://arxiv.org/abs/hep-ph/0505122
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/44371
dc.subjectHigh Energy Physics - Phenomenology
dc.titleDetermination of |V_us| from hadronic tau decays
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