A measurement of the τ⁻→μ⁻νν branching ratio

G Abbiendi; Georgios Anagnostou; Paul Bell; Ian Bloodworth; David Charlton; Christopher Hawkes; Roger Homer; Predrag Jovanovic; Thomas McMahon; Stephen O'Neale; Miriam Watson; Peter Watkins; Alan Watson; Nigel Watson; John Wilson

doi:10.1016/S0370-2693(02)03020-4

A measurement of the τ⁻→μ⁻νν branching ratio

G Abbiendi, Georgios Anagnostou, Paul Bell, Ian Bloodworth, David Charlton, Christopher Hawkes, Roger Homer, Predrag Jovanovic, Thomas McMahon, Stephen O'Neale, Miriam Watson, Peter Watkins, Alan Watson, Nigel Watson, John Wilson

Physics and Astronomy

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Abstract

The tau(-) --> mu(-)(nu) 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-(nu) over bar (mu)nu(tau))= 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 g(mu)/g(e) = 1.0005 +/- 0.0044 and g(tau)/g(e) = 1.0031 +/- 0.0048, in good agreement with the Standard Model prediction of unity. A value for the Michel parameter eta = 0.004 +/- 0.037 has also been determined and used to find a limit for the mass of the charged Higgs boson, m(H)+/- > 1.28 tan beta, in the Minimal Supersymmetric Standard Model. (C) 2002 Elsevier Science B.V. All rights reserved.

Original language	English
Pages (from-to)	35-48
Number of pages	14
Journal	Physics Letters B
Volume	551
Issue number	1-2
DOIs	https://doi.org/10.1016/S0370-2693(02)03020-4
Publication status	Published - 2 Jan 2003

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@article{6f951ae29f3e4f4daf59283fbf01dd3b,

title = "A measurement of the τ⁻→μ⁻νν branching ratio",

abstract = "The tau(-) --> mu(-)(nu) 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-(nu) over bar (mu)nu(tau))= 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 g(mu)/g(e) = 1.0005 +/- 0.0044 and g(tau)/g(e) = 1.0031 +/- 0.0048, in good agreement with the Standard Model prediction of unity. A value for the Michel parameter eta = 0.004 +/- 0.037 has also been determined and used to find a limit for the mass of the charged Higgs boson, m(H)+/- > 1.28 tan beta, in the Minimal Supersymmetric Standard Model. (C) 2002 Elsevier Science B.V. All rights reserved.",

author = "G Abbiendi and Georgios Anagnostou and Paul Bell and Ian Bloodworth and David Charlton and Christopher Hawkes and Roger Homer and Predrag Jovanovic and Thomas McMahon and Stephen O'Neale and Miriam Watson and Peter Watkins and Alan Watson and Nigel Watson and John Wilson",

year = "2003",

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doi = "10.1016/S0370-2693(02)03020-4",

language = "English",

volume = "551",

pages = "35--48",

journal = "Physics Letters B",

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TY - JOUR

T1 - A measurement of the τ⁻→μ⁻νν branching ratio

AU - Abbiendi, G

AU - Anagnostou, Georgios

AU - Bell, Paul

AU - Bloodworth, Ian

AU - Charlton, David

AU - Hawkes, Christopher

AU - Homer, Roger

AU - Jovanovic, Predrag

AU - McMahon, Thomas

AU - O'Neale, Stephen

AU - Watson, Miriam

AU - Watkins, Peter

AU - Watson, Alan

AU - Watson, Nigel

AU - Wilson, John

PY - 2003/1/2

Y1 - 2003/1/2

N2 - The tau(-) --> mu(-)(nu) 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-(nu) over bar (mu)nu(tau))= 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 g(mu)/g(e) = 1.0005 +/- 0.0044 and g(tau)/g(e) = 1.0031 +/- 0.0048, in good agreement with the Standard Model prediction of unity. A value for the Michel parameter eta = 0.004 +/- 0.037 has also been determined and used to find a limit for the mass of the charged Higgs boson, m(H)+/- > 1.28 tan beta, in the Minimal Supersymmetric Standard Model. (C) 2002 Elsevier Science B.V. All rights reserved.

AB - The tau(-) --> mu(-)(nu) 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-(nu) over bar (mu)nu(tau))= 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 g(mu)/g(e) = 1.0005 +/- 0.0044 and g(tau)/g(e) = 1.0031 +/- 0.0048, in good agreement with the Standard Model prediction of unity. A value for the Michel parameter eta = 0.004 +/- 0.037 has also been determined and used to find a limit for the mass of the charged Higgs boson, m(H)+/- > 1.28 tan beta, in the Minimal Supersymmetric Standard Model. (C) 2002 Elsevier Science B.V. All rights reserved.

U2 - 10.1016/S0370-2693(02)03020-4

DO - 10.1016/S0370-2693(02)03020-4

M3 - Article

VL - 551

SP - 35

EP - 48

JO - Physics Letters B

JF - Physics Letters B

IS - 1-2

ER -

A measurement of the τ⁻→μ⁻νν branching ratio

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