Production and Decay With the Cello Detector at {PETRA}
Feb, 198910 pages
Published in:
- Phys.Lett.B 222 (1989) 163-172
- Published: 1989
Report number:
- DESY-89-016
Experiments:
Citations per year
Abstract: (Elsevier)
The reaction e + e − → τ + τ − has been studied at centre of mass energies between 14.0 and 46.8 GeV with the CELLO detector at the PETRA e + e − collider. We present results for the cross section σ τ and the charge asymmetry A τ . The results are in good agreement with the standard model. We have also measured the topological decay rates BR 1 , BR 3 and BR 5 for the inclusive decay of the τ lepton into one, three and five charge particles. The results confirm and improve earlier CELLO measurements at other energies. We find for the combined values at all energies BR 1 = (84.9 ± 0.4 ± 0.3)%, BR 3 = (15.0 ± 0.4 ± 0.3)% and BR 5 = (0.16 ± 0.13 ± 0.04)%.- ELECTRON POSITRON: COLLIDING BEAMS
- COLLIDING BEAMS: ELECTRON POSITRON
- ELECTRON POSITRON: ANNIHILATION
- ANNIHILATION: ELECTRON POSITRON
- TAU: ELECTROPRODUCTION
- ELECTROPRODUCTION: TAU
- TAU: PAIR PRODUCTION
- PAIR PRODUCTION: TAU
- TAU: SEMILEPTONIC DECAY
- SEMILEPTONIC DECAY: TAU
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