# Measurement of the Topological Branching Fractions of the $\tau$ lepton at LEP

3 CMS
IP2I Lyon - Institut de Physique des 2 Infinis de Lyon
Abstract : Using data collected with the L3 detector at LEP from 1992 to 1995 on the Z peak, we determine the branching fractions of the $\tau$ lepton into one, three and five charged particles to be: \begin{eqnarray*} & {\cal{B}}(\tau\rightarrow (1-prong)) & = 85.274 \pm 0.105 \pm 0.073 \% , \\ & {\cal{B}}(\tau\rightarrow (3-prong)) & = 14.556 \pm 0.105 \pm 0.076 \%, \\ & {\cal{B}}(\tau\rightarrow (5-prong)) & = \phantom{0} 0.170 \pm 0.022 \pm 0.026 \%. \end{eqnarray*} \noindent The first uncertainties are statistical and the second systematic. The accuracy of these measurements alone is similar to that of the current world avera
Document type :
Journal articles

Cited literature [9 references]

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Submitted on : Wednesday, October 17, 2001 - 11:08:16 AM
Last modification on : Friday, September 10, 2021 - 1:50:06 PM
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### Identifiers

• HAL Id : in2p3-00010405, version 1

### Citation

P. Achard, O. Adriani, M. Aguilar-Benitez, J. Alcaraz, G. Alemanni, et al.. Measurement of the Topological Branching Fractions of the $\tau$ lepton at LEP. Physics Letters B, Elsevier, 2001, 519, pp.189-198. ⟨in2p3-00010405⟩

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