V-us determination from hyperon semileptonic decays
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V-us determination from hyperon semileptonic decays

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V-us determination from hyperon semileptonic decays

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dc.contributor.author Mateu Barreda, Vicent
dc.contributor.author Pich Zardoya, Antonio
dc.date.accessioned 2015-02-27T10:18:54Z
dc.date.available 2015-02-27T10:18:54Z
dc.date.issued 2005
dc.identifier.uri http://hdl.handle.net/10550/42492
dc.description.abstract We analyze the numerical determination of the quark mixing factor V-us from hyperon semileptonic decays. The discrepancies between the results obtained in two previous studies are clarified. Our fits indicate sizeable SU(3) breaking corrections, which unfortunately can only be fully determined from the data at the first order. The lack of a reliable theoretical calculation of second-order symmetry breaking effects translates into a large systematic uncertainty, which has not been taken into account previously. Our final result, vertical bar V(us)vertical bar = 0.226 +/- 0.005, is not competitive with the existing determinations from K-l3, K-l2 and tau decays.
dc.language.iso eng
dc.relation.ispartof Journal of High Energy Physics, 2005, vol. 2005, num. 10, p. 041-1-041-15
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source Mateu Barreda, Vicent Pich Zardoya, Antonio 2005 V-us determination from hyperon semileptonic decays Journal of High Energy Physics 2005 10 041-1 041-15
dc.subject Física
dc.title V-us determination from hyperon semileptonic decays
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-02-27T10:18:55Z
dc.identifier.doi http://dx.doi.org/10.1088/1126-6708/2005/10/041
dc.identifier.idgrec 025690

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