Measurements of Charged Current Lepton Universality and |V{sub us}| Using Tau Lepton Decays to e{sup -{nu}}{sub e{nu}{tau}}, {mu}{sup -{nu}}{sub {mu}{nu}{tau}}, {pi}{sup -{nu}}{sub {tau},} and K{sup -{nu}}{sub {tau}}

Journal Article · Fri Jul 30 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.105.051602· OSTI ID:21410945

Aubert, B; Karyotakis, Y; Lees, J P; Poireau, V; Prencipe, E; Prudent, X; Tisserand, V ^[1]; Garra Tico, J; Grauges, E ^[2]; Martinelli, M; Palano, A; Pappagallo, M ^[3]; Eigen, G; Stugu, B; Sun, L ^[4]; Battaglia, M; Brown, D N; Kerth, L T; Kolomensky, Yu G; Lynch, G ^[5]

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1. Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
2. Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
3. INFN Sezione di Bari, I-70126 Bari (Italy)
4. University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
5. Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)

Using 467 fb{sup -1} of e{sup +}e{sup -} annihilation data collected with the BABAR detector, we measure (B({tau}{sup -{yields}}{mu}-{nu}{sub {mu}{nu}{tau}}))/B({tau}{sup -{yields}}e{sup -{nu}}{sub e{nu}{tau}})=(0.9796{+-}0.0016{+-}0.0036), (B({tau}{sup -{yields}}{pi}-{nu}{sub {tau}})/B({tau}{sup -{yields}}e{sup -{nu}}{sub e{nu}{tau}}))=(0.5945{+-}0.0014{+-}0.0061), and (B({tau}{sup -{yields}}K{sup -{nu}}{sub {tau}})/B({tau}{sup -{yields}}e{sup -{nu}}{sub e{nu}{tau}}))=(0.03882{+-}0.00032{+-}0.00057), where the uncertainties are statistical and systematic, respectively. From these precision {tau} measurements, we test the standard model assumption of {mu}-e and {tau}-{mu} charge current lepton universality and provide determinations of |V{sub us}| experimentally independent of the decay of a kaon.

• OSTI ID: 21410945
• Journal Information: Physical Review Letters, Vol. 105, Issue 5; Other Information: DOI: 10.1103/PhysRevLett.105.051602; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ANNIHILATION
CHARGED CURRENTS
ELECTRONS
KAONS MINUS
PARTICLE DECAY
PIONS MINUS
POSITRONS
POTASSIUM IONS
STANDARD MODEL
TAU PARTICLES
ALGEBRAIC CURRENTS
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BOSONS
CHARGED PARTICLES
CURRENTS
DECAY
ELEMENTARY PARTICLES
FERMIONS
FIELD THEORIES
GRAND UNIFIED THEORY
HADRONS
HEAVY LEPTONS
INTERACTIONS
IONS
KAONS
LEPTONS
MATHEMATICAL MODELS
MATTER
MESONS
PARTICLE INTERACTIONS
PARTICLE MODELS
PIONS
PSEUDOSCALAR MESONS
QUANTUM FIELD THEORY
STRANGE MESONS
STRANGE PARTICLES
UNIFIED GAUGE MODELS