Measurement of tau lifetime and branching ratios

Journal Article · Mon Apr 15 04:00:00 EST 1985 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.54.1624· OSTI ID:5603193

Fernandez, E; Ford, W T; Qi, N; Read, Jr, A L; Smith, J G; Camporesi, T; De Sangro, R; Marini, A; Peruzzi, I; Piccolo, M

Precise results are reported for the tau-lepton lifetime and several tau branching ratios obtained with the MAC detector operating at PEP at ..sqrt..s = 29 GeV. We find tau/sub tau/ = (3.15 +- 0.36 +- 0.4) x 10 /sup -13/ sec. Results for the topological branching ratios B/sub 1/, B/sub 3/, B/sub 5/ (tau decaying into 1, 3, 5 charged particles) are B/sub 3/equivalent1-B/sub 1/ = 0.133 +- 0.003 +- 0 .006 and B/sub 5/<0.0017 at the 95% confidence level. The fraction of all three-prong decays unaccompanied by ..pi../sup 0/'s is found to be 0.61 +- 0.03 +- 0.05.

• Research Organization: Department of Physics, University of Colorado, Boulder, Colorado 80309
• DOE Contract Number: AC02-76ER00881; AC02-81ER40025; AC03-76SF00515
• OSTI ID: 5603193
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 54:15; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

645102* -- High Energy Physics-- Particle Interactions &amp; Properties-Experimental-- Weak Interactions &amp; Properties
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
BRANCHING RATIO
CHARGED PARTICLES
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY RANGE
EXPERIMENTAL DATA
FERMIONS
GEV RANGE
GEV RANGE 10-100
HEAVY LEPTONS
INFORMATION
LEPTONS
LIFETIME
MATHEMATICS
MECHANICS
NUMERICAL DATA
PEP STORAGE RINGS
POSTULATED PARTICLES
STATISTICAL MECHANICS
STORAGE RINGS
TAU PARTICLES
TOPOLOGY