# One-prong $\tau$ decays with kaons

Abstract : One-prong $\tau$ decays into final states involving kaons are studied with about 161k $\tau^+\tau^-$ events collected by the ALEPH detector from 1991 to 1995. Charged kaons are identified by dE/dx measurement, while $K^0_L$'s are detected through their interaction in calorimeters. Branching ratios are measured for the inclusive mode, $B(\tau^-\rightarrow K^-X\nu_\tau)=(1.52 \pm 0.04\pm0.04)\%$, where $X$ can be any system of neutral particles, and for the exclusive modes \begin{center} \begin{tabular}{rcl} $B(\tau^-\to K^-\nu_\tau)$ &=& $(6.96\pm0.25\pm0.14)\times 10^{-3}$,\\ $B(\tau^-\to K^-\pi^0\nu_\tau)$ &=& $(4.44\pm0.26\pm0.24)\times 10^{-3}$,\\ $B(\tau^-\to K^-\pi^0\pi^0\nu_\tau)$ &=& $(0.56\pm0.20\pm0.15)\times 10^{-3}$,\\ $B(\tau^-\to K^-\pi^0\pi^0\pi^0\nu_\tau)$ &=& $(0.37\pm0.21\pm0.11)\times 10^{-3}$,\\ $B(\tau^-\to K^-K^{0}\nu_\tau)$ &=& $(1.62\pm0.21\pm0.11)\ times 10^{-3}$,\\ $B(\tau^-\to K^{-}K^{0}\pi^0\nu_\tau)$ &
Document type :
Journal articles

Cited literature [4 references]

http://hal.in2p3.fr/in2p3-00003572
Contributor : Claudine Bombar <>
Submitted on : Friday, October 8, 1999 - 10:18:41 AM
Last modification on : Monday, June 3, 2019 - 1:38:03 PM
Long-term archiving on : Friday, May 29, 2015 - 4:25:19 PM

### Identifiers

• HAL Id : in2p3-00003572, version 1

### Citation

R. Barate, D. Decamp, P. Ghez, C. Goy, J.P. Lees, et al.. One-prong $\tau$ decays with kaons. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 1999, 10, pp.1-18. ⟨in2p3-00003572⟩

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