Published April 1982 | Version v1
Report Restricted

Measurement of e+e- → tau+tau- at high energy and properties of the tau lepton

Creators

  • 1. Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany, F.R.)
  • 2. Karlsruhe Univ. (TH) (Germany, F.R.)
  • 3. Kernforschungszentrum Karlsruhe G.m.b.H. (Germany, F.R.)

Description

The e+e- → tau+tau- process has been measured using the CELLO detector at a mean total centre of mass energy of 34.2 GeV using essentially all the decay channels of the tau lepton. The measured cross section yields Rsub(tau) = 1.03 +- .05 (stat) +- .07 (syst). Topological branching fractions are given for tau → 1, 3 or 5 charged tracks. The angular distribution shows a clear 1 + cos2THETA dependence with a forward-backward asymmetry of -.103 +- .052 corresponding to an axial-vector coupling asub(tau) of the tau to the weak neutral current given by asub(tau) = -1.12 +- .57. (orig.)

Availability note (English)

MF available from INIS under the Report Number.

Files

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Additional details

Publishing Information

Imprint Pagination
13 p.
Report number
DESY--82-020

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
13694298
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Numerical Data
Descriptors DEI
ANGULAR DISTRIBUTION; ANNIHILATION; ASYMMETRY; AXIAL-VECTOR CURRENTS; BRANCHING RATIO; COUPLING CONSTANTS; DIFFERENTIAL CROSS SECTIONS; ELECTRON-POSITRON INTERACTIONS; EXPERIMENTAL DATA; GEV RANGE 10-100; NEUTRAL-CURRENT INTERACTIONS; PAIR PRODUCTION; TAU PARTICLES; WEAK NEUTRAL CURRENTS
Descriptors DEC
ALGEBRAIC CURRENTS; CROSS SECTIONS; CURRENTS; DATA; DISTRIBUTION; ELEMENTARY PARTICLES; ENERGY RANGE; FERMIONS; GEV RANGE; HEAVY LEPTONS; INFORMATION; INTERACTIONS; LEPTON-LEPTON INTERACTIONS; LEPTONS; NEUTRAL CURRENTS; NUMERICAL DATA; PARTICLE INTERACTIONS; PARTICLE PRODUCTION; POSTULATED PARTICLES

Optional Information

Notes
CELLO Collaboration.
Secondary number(s)
LAL--82/08.