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Title: | Measurements of Charged Current Lepton Universality and |Vus| Using Tau Lepton Decays to e−¯νeντ, μ−¯νμντ, π−ντ, and K−ντ |
Author: | Garra Ticó, Jordi Graugés Pous, Eugeni BABAR Collaboration |
Keywords: | Física de partícules Experiments Particle physics Experiments |
Issue Date: | 28-Jul-2010 |
Publisher: | American Physical Society |
Abstract: | Using 467 fb − 1 of e + e − annihilation data collected with the BABAR detector, we measure B ( τ − → μ − ¯ ν μ ν τ ) B ( τ − → e − ¯ ν e ν τ ) = ( 0.9796 ± 0.0016 ± 0.0036 ) , B ( τ − → π − ν τ ) B ( τ − → e − ¯ ν e ν τ ) = ( 0.5945 ± 0.0014 ± 0.0061 ) , and B ( τ − → K − ν τ ) B ( τ − → e − ¯ ν e ν τ ) = ( 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 μ − e and τ − μ charge current lepton universality and provide determinations of | V us | experimentally independent of the decay of a kaon. |
Note: | Reproducció del document publicat a: https://doi.org/10.1103/PhysRevLett.105.051602 |
It is part of: | Physical Review Letters, 2010, vol. 105, num. 5, p. 051602 |
URI: | http://hdl.handle.net/2445/135279 |
Related resource: | https://doi.org/10.1103/PhysRevLett.105.051602 |
ISSN: | 0031-9007 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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