Studies of {tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}} and {tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}} at BABAR and a search for a second-class current
Journal Article
·
· Physical Review. D, Particles Fields
- Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP), Universite de Savoie, CNRS/IN2P3, F-74941 Annecy-Le-Vieux (France)
- Universitat de Barcelona, Facultat de Fisica, Departament ECM, E-08028 Barcelona (Spain)
- INFN Sezione di Bari, I-70126 Bari (Italy)
- University of Bergen, Institute of Physics, N-5007 Bergen (Norway)
- Lawrence Berkeley National Laboratory and University of California, Berkeley, California 94720 (United States)
We report on analyses of tau lepton decays {tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}} and {tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}}, with {eta}{yields}{pi}{sup +}{pi}{sup -}{pi}{sup 0}, using 470 fb{sup -1} of data from the BABAR experiment at PEP-II, collected at center-of-mass energies at and near the {Upsilon}(4S) resonance. We measure the branching fraction for the {tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}} decay mode, B({tau}{sup -}{yields}{eta}K{sup -}{nu}{sub {tau}})=(1.42{+-}0.11(stat){+-}0.07(syst))x10{sup -4}, and report a 95% confidence level upper limit for the second-class current process {tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}}, B({tau}{sup -}{yields}{eta}{pi}{sup -}{nu}{sub {tau}})<9.9x10{sup -5}.
- OSTI ID:
- 21504845
- Journal Information:
- Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 3 Vol. 83; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ALGEBRAIC CURRENTS
BOSONS
BRANCHING RATIO
CENTER-OF-MASS SYSTEM
CURRENTS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
HADRONS
HEAVY LEPTONS
KAONS
KAONS MINUS
LEPTONS
MASSLESS PARTICLES
MESONS
NEUTRINOS
PARTICLE DECAY
PEP STORAGE RINGS
PIONS
PIONS MINUS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RESONANCE
SECOND-CLASS CURRENTS
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
TAU NEUTRINOS
TAU PARTICLES
VECTOR MESONS
ALGEBRAIC CURRENTS
BOSONS
BRANCHING RATIO
CENTER-OF-MASS SYSTEM
CURRENTS
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
ETA MESONS
FERMIONS
HADRONS
HEAVY LEPTONS
KAONS
KAONS MINUS
LEPTONS
MASSLESS PARTICLES
MESONS
NEUTRINOS
PARTICLE DECAY
PEP STORAGE RINGS
PIONS
PIONS MINUS
PIONS NEUTRAL
PSEUDOSCALAR MESONS
RESONANCE
SECOND-CLASS CURRENTS
STORAGE RINGS
STRANGE MESONS
STRANGE PARTICLES
TAU NEUTRINOS
TAU PARTICLES
VECTOR MESONS