Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 5, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.051602
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Funding
- SLAC
- DOE
- NSF (USA)
- NSERC (Canada)
- CEA
- CNRS-IN2P3 (France)
- BMBF
- DFG (Germany)
- INFN (Italy)
- FOM (The Netherlands)
- NFR (Norway)
- MEC (Spain)
- STFC (United Kingdom)
- Marie Curie EIF (European Union)
- A.P. Sloan Foundation
- Science and Technology Facilities Council [ST/H000992/1, ST/H001166/1, ST/F008015/1, PP/E000444/1] Funding Source: researchfish
- STFC [ST/H001166/1, ST/H000992/1, ST/F008015/1] Funding Source: UKRI
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Using 467 fb(-1) of e(+)e(-) annihilation data collected with the BABAR detector, we measure B(tau(-)->mu(-)(nu) over bar (mu)nu(tau))/B(tau(-)-> e(-)(nu) over bar (e)nu(tau)) = (0.9796 +/- 0.0016 +/- 0.0036), B(tau(-)->pi(-)nu(tau))/B(tau(-)-> e(-)nu(e)nu(tau)) = (0.5945 +/- 0.0014 +/- 0.0061), and B(tau(-)-> K-nu(tau))/B(tau(-)-> e(-)nu(e)nu(tau)) = (0.03882 +/- 0.00032 +/- 0.00057), where the uncertainties are statistical and systematic, respectively. From these precision similar to measurements, we test the standard model assumption of mu - e and tau - mu charge current lepton universality and provide determinations of vertical bar V-us vertical bar experimentally independent of the decay of a kaon.
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