Measurements of Charged Current Lepton Universality and |V[subscript us]| Using Tau Lepton Decays to e-ν[over-bar]eνtau, mu-ν[over-bar]muν, pi-νtau, and K-νtau
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Aubert-2010-Measurements of Char.pdf
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Author(s)
Dujmic, Denis
Henderson, Shawn Wesley
Sciolla, Gabriella
Yamamoto, R. K.
Zhao, M.
Fisher, Peter H
Cowan, Ray F
Spitznagel, Michael A
Alternative Title
Measurements of Charged Current Lepton Universality and |Vus| Using Tau Lepton Decays to e-ν̅ eντ, μ-ν̅ μντ, π-ντ, and K-ντ
Date Issued
July 2010
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
BABAR Collaboration et al. “Measurements of Charged Current Lepton Universality and |V_{us}| Using Tau Lepton Decays to e^{-} nu [over -bar]_{e} nu _{ tau }, mu^{-} nu [over -bar]_{mu} nu _{ tau }, pi^{-} nu _{ tau }, and K^{-} nu _{ tau }.” Physical Review Letters 105.5 (2010): 051602. © 2010 The American Physical Society.
Version
Final published version
Abstract
Using 467 fb-1 of e+e- annihilation data collected with the BABAR detector, we measure B(τ- -->mu-ν̅ muντ)/B(τ- -->e-ν̅ eντ)=(0.9796±0.0016±0.0036), B(τ- -->pi-ντ)/B(τ- -->e-ν̅ eντ)=(0.5945±0.0014±0.0061), and B(τ-→K-ντ)/B(τ- -->e-ν̅ eντ)=(0.03882±0.00032±0.00057), where the uncertainties are statistical and systematic, respectively. From these precision τ measurements, we test the standard model assumption of mu-e and τ-mu charge current lepton universality and provide determinations of |Vus| experimentally independent of the decay of a kaon.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.105.051602
