Final published version
Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
}
TY - JOUR
T1 - A measurement of the τ − → µ−ν¯µντ branching ratio
AU - Bailey, Ian Richard
AU - Kartvelishvili, Vakhtang
AU - OPAL Collaboration
PY - 2003/1/2
Y1 - 2003/1/2
N2 - The τ− → µ−ν¯µντ branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B(τ− → µ−ν¯µντ ) = 0.1734 ± 0.0009(stat) ± 0.0006(syst) has been used in conjunction with other OPAL measurements to test lepton universality, yielding the coupling constant ratios gµ/ge = 1.0005 ± 0.0044 and gτ /ge = 1.0031 ± 0.0048, in good agreement with the Standard Model prediction of unity. A value for the Michel parameter η = 0.004 ± 0.037 has also been determined and used to find a limit for the mass of the charged Higgs boson, mH± > 1.28 tan β, in the Minimal Supersymmetric Standard Model.
AB - The τ− → µ−ν¯µντ branching ratio has been measured using data collected from 1990 to 1995 by the OPAL detector at the LEP collider. The resulting value of B(τ− → µ−ν¯µντ ) = 0.1734 ± 0.0009(stat) ± 0.0006(syst) has been used in conjunction with other OPAL measurements to test lepton universality, yielding the coupling constant ratios gµ/ge = 1.0005 ± 0.0044 and gτ /ge = 1.0031 ± 0.0048, in good agreement with the Standard Model prediction of unity. A value for the Michel parameter η = 0.004 ± 0.037 has also been determined and used to find a limit for the mass of the charged Higgs boson, mH± > 1.28 tan β, in the Minimal Supersymmetric Standard Model.
KW - 2-PHOTON PRODUCTION PROCESSES
KW - HIGH-ENERGY
KW - MICROVERTEX DETECTOR
KW - MONTE-CARLO
KW - LEP
KW - PARAMETERS
KW - DECAYS
KW - GENERATION
KW - COUPLINGS
KW - PROGRAM
U2 - 10.1016/S0370-2693(02)03020-4
DO - 10.1016/S0370-2693(02)03020-4
M3 - Journal article
VL - 551
SP - 35
EP - 48
JO - Physics Letters B
JF - Physics Letters B
SN - 0370-2693
IS - 1-2
ER -