Observation of tau -lepton decay to five charged particles.
Phys Rev Lett 54:16 (1985) 1775-1778
Measurement of the reaction e+e- → τ+τ- at √s = 29 GeV
Physics Letters B 153:1-2 (1985) 116-120
Abstract:
The reaction e+e- → τ+τ- has been measured using the high resolution spectrometer at PEP. The angular distribution shows a forward-backward asymmetry of -(6.1±2.3±0.5)%, corresponding to an axial-vector coupling if gaτgae = 0.28 ±0.11± 0.03, in good agreement with the standard model of electroweak interactions. The measured cross section yields ifRττ = 1.10± 0.03±0.04, consistent with QED and giving QED cutoff parameters of Λ+>92 GeV and Λ->246 GeV at 95% C.L. © 1985.New results on the reaction e+e-→μ+μ- at s =29 GeV
Physical Review D 31:9 (1985) 2352-2355
Abstract:
We have measured the process e+e-→μ+μ- at s =29 GeV using the High Resolution Spectrometer at SLAC PEP. The forward-backward charge asymmetry is Aμμ=-(4.9±1.5±0.5)% based on 5057 events. A subsample of 3488 μ+μ- events in the angular range cosθ<0.55 gives a cross-section ratio of Rμμ=0.990±0.017±0.030. The resulting couplings of the weak neutral current are gaegaμ=0.208±0.064± 0.021 and gvegvμ=0.027 ±0.051±0.089. The QED cutoff parameters are Λ+>170 GeV and Λ->146 GeV at 95% C.L. © 1985 The American Physical Society.Study of quark fragmentation in e+e- annihilation at 29 GeV: Global jet parameters and single-particle distributions.
Phys Rev D Part Fields 31:1 (1985) 1-16
MEASUREMENT OF THE REACTION E+E--]TAU+TAU-AT SQUARE-ROOT-S=29 GEV
PHYSICS LETTERS B 153:1-2 (1985) 116-120