Measurement of the branching ratio for the process b ->tau(-)(nu)over-bar(tau)X
G Abbiendi, C Ainsley, PF Akesson, G Alexander, J Allison, G Anagnostou, KJ Anderson, S Arcelli, S Asai, D Axen, G Azuelos, I Bailey, E Barberio, RJ Barlow, RJ Batley, T Behnke, KW Bell, PJ Bell, G Bella, A Bellerive Show all
PHYSICS LETTERS B | ELSEVIER SCIENCE BV | Published : 2001
The inclusive branching ratio for the process b → τ-ν̄τX) has been measured using hadronic Z decays collected by the OPAL experiment at LEP in the years 1992-2000. The result is: BR(b → τ-ν̄τX) = (2.78 ± 0.18 ± 0.51)%. This measurement is consistent with the Standard Model expectation and puts a constraint of tan β/MH± < 0.53 GeV-1 at the 95% confidence level on Type II Two Higgs Doublet Models. © 2001 Elsevier Science B.V. All rights reserved.