One prong tau decays with kaons

ALEPH Collaboration, The and Barate, R. and Betteridge, Andrew and Bowdery, Christopher and Colrain, Paul and Finch, Alexander and Foster, Frank and Hughes, Gareth and Jones, Roger and Williams, Mark (1999) One prong tau decays with kaons. The European Physical Journal C (EPJ C) - Particles and Fields, 10 (1). pp. 1-18. ISSN 1434-6052

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One-prong τ decays into final states involving kaons are studied with about 161 000 τ+τ− events collected by the ALEPH detector from 1991 to 1995. Charged kaons are identified by dE/dx measurement, while K0L 's are detected through their interaction in calorimeters. Branching ratios are measured for the inclusive mode, B(τ−→K−Xντ)=(1.52±0.04±0.04)% , where X can be any system of neutral particles, and for the exclusive modes B(τ−→K−ντ)=(6.96±0.25±0.14)×10−3,B(τ−→K−π0ντ)=(4.44±0.26±0.24)×10−3,B(τ−→K−π0π0ντ)=(0.56±0.20±0.15)×10−3,B(τ−→K−π0π0π0ντ)=(0.37±0.21±0.11)×10−3,B(τ−→K−K0ντ)=(1.62±0.21±0.11)×10−3,B(τ−→K−K0π0ντ)=(1.43±0.25±0.15)×10−3,B(τ−→K0¯¯¯¯¯π−ντ)=(9.28±0.45±0.34)×10−3,B(τ−→K0¯¯¯¯¯π−π0ντ)=(3.47±0.53±0.37)×10−3, where the first error is statistical and the second is systematical. Upper limits for B(τ−→K0¯¯¯¯¯π−π0π0ντ) and B(τ−→K−K0π0π0ντ) are also obtained. Mass spectra in the final states are investigated in order to study the relevant dynamics.

Item Type:
Journal Article
Journal or Publication Title:
The European Physical Journal C (EPJ C) - Particles and Fields
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?? physics and astronomy (miscellaneous)engineering (miscellaneous) ??
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14 May 2013 08:34
Last Modified:
15 Jul 2024 13:50