The European Physical Journal C

ISSN: 1434-6044 (printed version)
ISSN: 1434-6052 (electronic version)

Table of Contents

Abstract Volume 4 Issue 2 (1998) pp 193-206
DOI 10.1007/s100529800893

experimental physics:
Measurement of the one-prong hadronic tau branching ratios at LEP

OPAL Collaboration , K. Ackerstaff et al. (8)

(8) CERN, European Organisation for Particle Physics, CH-1211 Geneva 23, Switzerland

Received: 4 December 1997 / Published online: 2 June 1998

Abstract. The branching ratios of the $\tau^-\rightarrow h^- \nu_\tau$ $\tau^- \rightarrow h^- \pi^0 \nu_\tau$ and $\tau^- \rightarrow h^- \geq 2 \pi^0 \nu_\tau $ decays have been measured using the 1991-1995 data recorded with the OPAL detector at LEP. These branching ratios are measured simultaneously using three selection criteria and are found to be \[ \begin{array} {l c c} {\rm BR}(\tau^- \rightarrow h^- \nu_\tau) & = & (11.98 \pm 0.13 \pm 0.16) \%\\ {\rm BR}(\tau^-\rightarrow h^- \pi^0 \nu_\tau) & = & (25.89 \pm 0.17 \pm 0.29) \%\\ {\rm BR}(\tau^- \rightarrow h^- \geq 2 \pi^0 \nu_\tau ) & = & ( 9.91 \pm 0.31 \pm 0.27) \% \end{array} \] where the first error is statistical and the second is systematic.

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Online publication: June 23, 1998
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