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ID 18766
file
creator
The SLD, Collaboration
abstract
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±0.10±0.04. The leptonic decay channels yield combined values of ρ = 0.72±0.09±0.03, ξ = 1.05±0.35±0.04, and δξ = 0.88±0.27±0.04.
journal title
Physical Review Letters
volume
Volume 78
issue
Issue 25
start page
4691
end page
4696
date of issued
1997-06-23
publisher
American Physical Society
issn
0031-9007
ncid
publisher doi
language
eng
nii type
Journal Article
HU type
Journal Articles
DCMI type
text
format
application/pdf
text version
publisher
rights
Copyright (c) 1997 American Physical Society.
relation url
department
Graduate School of Advanced Sciences of Matter