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Title: Properties of the tau lepton. [Review]

Abstract

The measured properties of the tau lepton and its neutrino are reviewed. A constrained fit to the world data gives a tau branching fraction to an electron plus neutrinos (B/sub e/) of (17.4 +- 2.1)% and B/sub mu//B/sub e/ = 1.07 +- 0.17. New data on the tau ..-->.. pi nu mode are in agreement with the expected branching fraction. There is evidence for the tau ..-->.. A/sub 1/ nu mode, but the A/sub 1/ resonance cannot be conclusively established from the current data. The DELCO experiment establishes the tau mass to be 1782 /sup +2//sub /sup -/7/ MeV/c/sup 2/ and the nu/sub tau/ mass to be less than 250 MeV/c/sup 2/. It also excludes V + A as a tau - nu/sub tau/ coupling and strongly favors V - A.

Authors:
Publication Date:
Research Org.:
Stanford Linear Accelerator Center, CA (USA)
OSTI Identifier:
6919880
Report Number(s):
SLAC-PUB-2138; CONF-780453-12
TRN: 78-018359
DOE Contract Number:  
EY-76-S-03-0326
Resource Type:
Conference
Resource Relation:
Conference: Neutrinos, West Lafayette, IN, USA, 28 Apr 1978
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; TAU NEUTRINOS; COUPLING; MASS; PARTICLE PROPERTIES; TAU PARTICLES; LEPTONIC DECAY; LIFETIME; SEMILEPTONIC DECAY; SPIN; WEAK HADRONIC DECAY; BRANCHING RATIO; LIMITING VALUES; REVIEWS; ANGULAR MOMENTUM; BASIC INTERACTIONS; DECAY; DOCUMENT TYPES; ELEMENTARY PARTICLES; FERMIONS; HEAVY LEPTONS; INTERACTIONS; LEPTONS; MASSLESS PARTICLES; NEUTRINOS; PARTICLE DECAY; POSTULATED PARTICLES; WEAK INTERACTIONS; WEAK PARTICLE DECAY; 645102* - High Energy Physics- Particle Interactions & Properties-Experimental- Weak Interactions & Properties

Citation Formats

Feldman, G J. Properties of the tau lepton. [Review]. United States: N. p., 1978. Web.
Feldman, G J. Properties of the tau lepton. [Review]. United States.
Feldman, G J. Thu . "Properties of the tau lepton. [Review]". United States. https://www.osti.gov/servlets/purl/6919880.
@article{osti_6919880,
title = {Properties of the tau lepton. [Review]},
author = {Feldman, G J},
abstractNote = {The measured properties of the tau lepton and its neutrino are reviewed. A constrained fit to the world data gives a tau branching fraction to an electron plus neutrinos (B/sub e/) of (17.4 +- 2.1)% and B/sub mu//B/sub e/ = 1.07 +- 0.17. New data on the tau ..-->.. pi nu mode are in agreement with the expected branching fraction. There is evidence for the tau ..-->.. A/sub 1/ nu mode, but the A/sub 1/ resonance cannot be conclusively established from the current data. The DELCO experiment establishes the tau mass to be 1782 /sup +2//sub /sup -/7/ MeV/c/sup 2/ and the nu/sub tau/ mass to be less than 250 MeV/c/sup 2/. It also excludes V + A as a tau - nu/sub tau/ coupling and strongly favors V - A.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1978},
month = {6}
}

Conference:
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