Vusandmsfrom HadronicτDecays

2004/08/03 by E. Gamiz, E. Gámiz, Matthias Jamin +7 · 3 citations
Physics and Astronomy · #Algorithm #Computer science #Hadron #High-Energy Particle Collisions Research #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum Chromodynamics and Particle Interactions #hep-ex #hep-lat #hep-ph

paper · pdf · doi:10.1103/physrevlett.94.011803

published as Phys.Rev.Lett.94:011803,2005 · 4 pages, 1 figure

arxiv created 2004/08/03 · openalex publication_date 2005/01/13 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Recent experimental results on hadronic \ensuremathτ decays into strange particles by the OPAL Collaboration are employed to determine V_us and m_s from moments of the invariant mass distribution. Our results are V_us=0.2208\ifmmode±\else\textpm\fi0.0034 and m_s(2 GeV)=81\ifmmode±\else\textpm\fi22 MeV. The error on V_us is dominated by experiment and should be improvable in the future. Nevertheless, already now our result is competitive with the standard extraction of V_us from K_e3 decays, and it is compatible with unitarity.

Citations

• Problems with extractingmsfrom flavor breaking in hadronic τ decays
• Strange quark mass from the invariant mass distribution of Cabibbo-suppressed tau decays
• Strange-quark mass from combined e+e− and τ-decay data: test of the isospin symmetry and implications on ϵ′/ϵ and mu,d
• Direct extraction of the chiral quark condensate and bounds on the light quark masses
• A Determination of the Cabibbo-Kobayashi-Maskawa Parameter|Vus|_ UsingKLDecays
• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)

Cited by

• Hadronic tau decays
• K π vector form factor, dispersive constraints and τ→ν τ K π decays
• Tests of the standard electroweak model in nuclear beta decay