Michel parameters and τ neutrino helicity from decay correlations in Z → τ+τ−
نویسندگان
چکیده
منابع مشابه
Measurement of the τ Neutrino Helicity and Michel Parameters in Polarized e + e − Collisions
We present a new measurement of the τ neutrino helicity hντ and the τ Michel parameters ρ, η, ξ and the product δξ. The analysis exploits the highly polarized SLC electron beam to extract these quantities directly from a measurement of the τ decay spectra, using the 1993-1995 SLD data sample of 4328 e+e− → Z0 → τ+τ− events. From the decays τ→πντ and τ→ρντ we obtain a combined value hντ = −0.93±...
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ژورنال
عنوان ژورنال: Physics Letters B
سال: 1995
ISSN: 0370-2693
DOI: 10.1016/0370-2693(95)00107-v