Tau Lepton 1-prong branching fractions to electrons, muons, pions, and kaons

Journal Article · Tue Dec 01 04:00:00 EST 1992 · Bulletin of the American Physical Society

OSTI ID:127812

Nicol, N A ^[1]

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1. Lawrence Berkeley Lab., CA (United States)

For a data sample of 140 pb{sup {minus}1} at a center of mass energy of 29 GeV from the TPC/2{gamma} detector facility at the PEP storage ring at SLAC, the authors have categorized all the 1-prong tau decays into four groups corresponding to the possible types of charged tracks - electron, muon, pion, and kaon. Identification of these particles is based on dE/dx information from the time projection chamber (3% resolution), energy measurements from the electromagnetic calorimeter (19%/{radical}E resolution), and hit patterns from the muon chambers (97% efficiency). The authors present preliminary results for the exclusive leptonic decays to electron and muon and for the inclusive hadronic decays to pion plus neutrals and kaon plus neutrals. They compare these results with predictions of the standard model and consider the implications for the tau 1-prong decay problem. In particular they look at the kaon content of the tau decays to check for consistency with expected values.

• OSTI ID: 127812
• Report Number(s): CONF-920376--
• Journal Information: Bulletin of the American Physical Society, Journal Name: Bulletin of the American Physical Society Journal Issue: 9 Vol. 37; ISSN BAPSA6; ISSN 0003-0503
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BRANCHING RATIO
ELECTRONS
KAONS
LEPTONIC DECAY
MUONS
PIONS
TAU PARTICLES
WEAK HADRONIC DECAY