Journal article
Measurement of the τ-→h-h h-v τ and τ-→h-h h-≥1π 0vτ branching ratios
R Akers, G Alexander, J Allison, N Altekamp, K Ametewee, KJ Anderson, S Anderson, S Arcelli, S Asai, D Axen, G Azuelos, AH Ball, E Barberio, RJ Barlow, R Bartoldus, JR Batley, G Beaudoin, S Bethke, A Beck, GA Beck Show all
European Physical Journal C | Published : 1995
DOI: 10.1007/BF01565256
Abstract
The branching ratios of the τ-→h-h+h-v τ and τ-→h-h+h-≥1π 0vτ decays, where h is either a charged π or K meson, are measured using a data sample of 87861 τ+τ- pairs collected with the OPAL detector at LEP. The two branching ratios are extracted simultaneously from a sample of three charged particle decays and found to be: {Mathematical expression} where the first error is statistical and the second systematic. The branching ratio of the τ lepton into three charged particles is measured to be: {Mathematical expression} © 1995 Springer-Verlag.