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Vus and ms from Hadronic τ Decays

AuthorsGámiz, Elvira; Jamin, Matthias; Pich, Antonio ; Prades, Joaquim ; Schwab, Félix
Issue Date14-Jan-2005
PublisherAmerican Physical Society
CitationPhysical Review Letters 94(1): 011803 (2005)
AbstractRecent experimental results on hadronic τ decays into strange particles by the OPAL Collaboration are employed to determine Vus and ms from moments of the invariant mass distribution. Our results are Vus=0.2208±0.0034 and ms(2  GeV)=81±22  MeV. The error on Vus is dominated by experiment and should be improvable in the future. Nevertheless, already now our result is competitive with the standard extraction of Vus from Ke3 decays, and it is compatible with unitarity.
Description4 páginas, 1 figura, 1 tabla.-- PACS numbers: 12.15.Hh, 11.55.Hx, 12.38.Lg, 14.60.Fg.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.94.011803
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