Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - A measurement of the tau(-) -> mu(-)(nu)over-bar(mu)nu(tau) branching ratio
AU - Kormos, L
PY - 2003/7
Y1 - 2003/7
N2 - The tau(-) --> mu(-)(ν) over bar (mu)nu(tau), 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(tau- --> mu(-)(ν) over bar mu(nu)mu(tau)) = 0.1734 +/- 0.0009(stat) +/- 0.0005(syst) has been used in conjunction with other OPAL measurements to test lepton universality, yielding the coupling constant ratios g(mu)/g(e) = 1.0005 +/- 0.0043 and g(tau)/g(e) = 1.0031 +/- 0.0047, in good agreement with the Standard Model prediction of unity, and also to determine a value for the Michel parameter eta = 0.004 +/- 0.036. This is subsequently used to find a model-dependent limit of the mass for the charged Higgs boson, m(H)+/- > 1.30 tan beta, in the Minimal Supersymmetric Standard Model framework.
AB - The tau(-) --> mu(-)(ν) over bar (mu)nu(tau), 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(tau- --> mu(-)(ν) over bar mu(nu)mu(tau)) = 0.1734 +/- 0.0009(stat) +/- 0.0005(syst) has been used in conjunction with other OPAL measurements to test lepton universality, yielding the coupling constant ratios g(mu)/g(e) = 1.0005 +/- 0.0043 and g(tau)/g(e) = 1.0031 +/- 0.0047, in good agreement with the Standard Model prediction of unity, and also to determine a value for the Michel parameter eta = 0.004 +/- 0.036. This is subsequently used to find a model-dependent limit of the mass for the charged Higgs boson, m(H)+/- > 1.30 tan beta, in the Minimal Supersymmetric Standard Model framework.
KW - 2-PHOTON PRODUCTION PROCESSES
KW - HIGH-ENERGY
KW - MICROVERTEX DETECTOR
KW - MONTE-CARLO
KW - DECAYS
KW - LEPTON
KW - PARAMETERS
KW - GENERATION
KW - COUPLINGS
KW - PROGRAM
U2 - 10.1016/S0920-5632(03)80304-3
DO - 10.1016/S0920-5632(03)80304-3
M3 - Journal article
VL - 123
SP - 30
EP - 39
JO - Nuclear Physics B - Proceedings Supplements
JF - Nuclear Physics B - Proceedings Supplements
SN - 0920-5632
ER -