Published January 1992 | Version v1
Report Metadata-only

Search for neutrinoless decays of the τ lepton with the ARGUS detector

Creators

Description

Upper limits on branching ratios for six neutrinoless leptonic, 16 semileptonic, two radiative-leptonic, two radiative-hadronic and three purely hadronic τ decays have been determined. The results improve over previously published ones by about a factor of two. For the first time the lepton and baryon-number violating decays τ- → anti p γ, τ- → anti p π0 and τ- → anti p η have been investigated. The 90% confidence level (CL) limits for the corresponding branching ratios amount to 2.9x10-4, 6.6 x 10-4 and 1.3x10-3 respectively. (orig.)

Availability note (English)

Available from FIZ Karlsruhe.

Abstract (German)

Es wurden obere Grenzen von Verzweigungsverhaeltnissen fuer sechs neutrinolose leptonische, 16 semileptonische, zwei radiativ-leptonische, zwei radiativ-hadronische und drei rein hadronische τ-Zerfaelle bestimmt. Die Resultate stellen eine Verbesserung gegenueber frueher veroeffentlichten Grenzen um etwa einen Faktor zwei dar. Erstmalig wurden die Lepton- und Baryonenzahl verletzenden Zerfaelle τ- → anti p γ, τ- → anti p π0 und τ- → anti p η untersucht. Die entsprechenden oberen Grenzen sind 2.9x10-4, 6.6x10-4 und 1.3x10-4 bei einem Konfidenzintervall von 90%. (orig.)

Additional details

Additional titles

Original title (German)
Suche nach neutrinolosen Zerfaellen des τ-Leptons mit dem ARGUS-Detektor

Publishing Information

Imprint Pagination
139 p.
Report number
DESY-F15--92-01

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
23050776
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data, Thesis, Non-conventional Literature
Descriptors DEI
ANGULAR CORRELATION; ANNIHILATION; ANTIPROTONS; BARYON NUMBER; BRANCHING RATIO; EFFECTIVE MASS; ELECTRON-POSITRON INTERACTIONS; ELECTRONS; ETA MESONS; EXPERIMENTAL DATA; GEV RANGE 01-10; HADRONIC PARTICLE DECAY; K*-892 MESONS; KAONS PLUS; LEPTON NUMBER; LEPTONIC DECAY; LIMITING VALUES; MASS SPECTRA; MUON PAIRS; MUONS MINUS; MUONS PLUS; PAIR PRODUCTION; PHOTONS; PIONS MINUS; PIONS NEUTRAL; PIONS PLUS; POSITRONS; PROTON SPECTRA; RADIATIVE DECAY; RHO-770 MESONS; SEMILEPTONIC DECAY; SYMMETRY BREAKING; TAU PARTICLES; WEAK HADRONIC DECAY; WEAK PARTICLE DECAY
Descriptors DEC
ANTIBARYONS; ANTILEPTONS; ANTIMATTER; ANTINUCLEI; ANTINUCLEONS; ANTIPARTICLES; BARYONS; BASIC INTERACTIONS; BOSONS; CATIONS; CHARGED PARTICLES; CORRELATIONS; DATA; DECAY; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HADRONS; HEAVY LEPTONS; HYDROGEN IONS; HYDROGEN IONS 1 PLUS; INFORMATION; INTERACTIONS; IONS; KAONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; MASS; MASSLESS PARTICLES; MATTER; MESONS; MUONS; NUCLEI; NUCLEONS; NUMERICAL DATA; PARTICLE DECAY; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; PIONS; PROTONS; PSEUDOSCALAR MESONS; SPECTRA; STRANGE MESONS; STRANGE PARTICLES; VECTOR MESONS; WEAK INTERACTIONS