A Study of One-Prong Tau Decays with a Charged Kaon
Abstract
From an analysis of the ionisation energy loss of charged particles selected from 110326 e+e- -> tau+tau- candidates recorded by the OPAL detector at e+e- centre-of-mass energies near the Z0 resonance, we determine the one-prong tau decay branching ratios: Br(tau- -> nutau K- >=0h0) = 1.528 +- 0.039 +- 0.040 % Br(tau- -> nutau K-) = 0.658 +- 0.024 +- 0.029 % where the h0 notation refers to a pi0, an eta, a K0S, or a K0L, and where the first uncertainty is statistical and the second is systematic.
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