Measurement of the τ Neutrino Helicity and Michel Parameters in Polarized e+e- Collisions
Physical Review Letters Volume 78 Issue 25
Page 4691-4696
published_at 1997-06-23
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| File | |
| Title ( eng ) |
Measurement of the τ Neutrino Helicity and Michel Parameters in Polarized e+e- Collisions
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| Creator |
The SLD Collaboration
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| Source Title |
Physical Review Letters
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| Volume | 78 |
| Issue | 25 |
| Start Page | 4691 |
| End Page | 4696 |
| 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.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 1997-06-23 |
| Rights |
Copyright (c) 1997 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.78.4691
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.78.4691
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