Measurement of the τ topological branching ratios at LEP

OPAL Collaboration

doi:10.1016/0370-2693(92)91117-R

Measurement of the τ topological branching ratios at LEP

OPAL Collaboration

Physics and Astronomy

Brunel University London
Tel Aviv University
University of Manchester
University of Cambridge
The University of Chicago
National Institute for Nuclear Physics
University of Victoria BC
University of British Columbia
University of Montreal
TRIUMF
University of Maryland, College Park
Homerton University Hospital NHS Foundation Trust
University of Freiburg
University of Hamburg
STFC Rutherford Appleton Laboratory
Heidelberg University
University of Bonn
University of Birmingham
CERN
Carleton University
University College London
Technion-Israel Institute of Technology

Research output: Contribution to journal › Article › peer-review

14 Scopus citations

Abstract

The inclusive branching ratios of the τ lepton to one, three and five charged particle final states are measured from data collected with the OPAL detector at LEP. The data sample consists of 12707e⁺e^- → τ⁺τ^- candidate events and has an estimated background of 1.9%. The branching ratios are obtained from a simultaneous fit to the data which gives B₁ = 84.48 ± 0.27 (stat) ±0.23 (sys)%, B₃ = 15.26±0.26±0.22% and B₅ = 0.26±0.06±0.05% respectively where B₁ + B₃ + B₅ is constrained to equal one. The inclusive one-prong branching ratio is found to be significantly lower than the 1990 Particle Data Group world average while the branching ratio to three charged particles is correspondingly higher. The five-prong branching ratio is in agreement with the world average measurement.

Original language	English
Pages (from-to)	373-385
Number of pages	13
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	288
Issue number	3-4
DOIs	https://doi.org/10.1016/0370-2693(92)91117-R
State	Published - Aug 27 1992

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@article{1533a09d951c42deae98f0be2eb0af2f,

title = "Measurement of the τ topological branching ratios at LEP",

abstract = "The inclusive branching ratios of the τ lepton to one, three and five charged particle final states are measured from data collected with the OPAL detector at LEP. The data sample consists of 12707e+e- → τ+τ- candidate events and has an estimated background of 1.9\%. The branching ratios are obtained from a simultaneous fit to the data which gives B1 = 84.48 ± 0.27 (stat) ±0.23 (sys)\%, B3 = 15.26±0.26±0.22\% and B5 = 0.26±0.06±0.05\% respectively where B1 + B3 + B5 is constrained to equal one. The inclusive one-prong branching ratio is found to be significantly lower than the 1990 Particle Data Group world average while the branching ratio to three charged particles is correspondingly higher. The five-prong branching ratio is in agreement with the world average measurement.",

author = "\{OPAL Collaboration\} and Acton, \{P. D.\} and G. Alexander and J. Allison and Allport, \{P. P.\} and Anderson, \{K. J.\} and S. Arcelli and A. Astbury and D. Axen and G. Azuelos and Bahan, \{G. A.\} and Baines, \{J. T.M.\} and Ball, \{A. H.\} and J. Banks and Barker, \{G. J.\} and Barlow, \{R. J.\} and S. Barnett and Batley, \{J. R.\} and G. Beaudoin and A. Beck and J. Becker and T. Behnke and Bell, \{K. W.\} and G. Bella and P. Berlich and S. Bethke and O. Biebel and U. Binder and Bloodworth, \{I. J.\} and P. Bock and B. Boden and Bosch, \{H. M.\} and S. Bougerolle and H. Breuker and Brown, \{R. M.\} and R. Brun and A. Buijs and Burckhart, \{H. J.\} and P. Capiluppi and Carnegie, \{R. K.\} and Carter, \{A. A.\} and Carter, \{J. R.\} and Chang, \{C. Y.\} and Charlton, \{D. G.\} and Clarke, \{P. E.L.\} and I. Cohen and Collins, \{W. J.\} and Conboy, \{J. E.\} and M. Cooper and M. Couch and Hobbs, \{J. D.\}",

note = "Publisher Copyright: {\textcopyright} 1992.",

year = "1992",

month = aug,

day = "27",

doi = "10.1016/0370-2693(92)91117-R",

language = "English",

volume = "288",

pages = "373--385",

journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",

issn = "0370-2693",

number = "3-4",

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TY - JOUR

T1 - Measurement of the τ topological branching ratios at LEP

AU - OPAL Collaboration

AU - Acton, P. D.

AU - Alexander, G.

AU - Allison, J.

AU - Allport, P. P.

AU - Anderson, K. J.

AU - Arcelli, S.

AU - Astbury, A.

AU - Axen, D.

AU - Azuelos, G.

AU - Bahan, G. A.

AU - Baines, J. T.M.

AU - Ball, A. H.

AU - Banks, J.

AU - Barker, G. J.

AU - Barlow, R. J.

AU - Barnett, S.

AU - Batley, J. R.

AU - Beaudoin, G.

AU - Beck, A.

AU - Becker, J.

AU - Behnke, T.

AU - Bell, K. W.

AU - Bella, G.

AU - Berlich, P.

AU - Bethke, S.

AU - Biebel, O.

AU - Binder, U.

AU - Bloodworth, I. J.

AU - Bock, P.

AU - Boden, B.

AU - Bosch, H. M.

AU - Bougerolle, S.

AU - Breuker, H.

AU - Brown, R. M.

AU - Brun, R.

AU - Buijs, A.

AU - Burckhart, H. J.

AU - Capiluppi, P.

AU - Carnegie, R. K.

AU - Carter, A. A.

AU - Carter, J. R.

AU - Chang, C. Y.

AU - Charlton, D. G.

AU - Clarke, P. E.L.

AU - Cohen, I.

AU - Collins, W. J.

AU - Conboy, J. E.

AU - Cooper, M.

AU - Couch, M.

AU - Hobbs, J. D.

PY - 1992/8/27

Y1 - 1992/8/27

N2 - The inclusive branching ratios of the τ lepton to one, three and five charged particle final states are measured from data collected with the OPAL detector at LEP. The data sample consists of 12707e+e- → τ+τ- candidate events and has an estimated background of 1.9%. The branching ratios are obtained from a simultaneous fit to the data which gives B1 = 84.48 ± 0.27 (stat) ±0.23 (sys)%, B3 = 15.26±0.26±0.22% and B5 = 0.26±0.06±0.05% respectively where B1 + B3 + B5 is constrained to equal one. The inclusive one-prong branching ratio is found to be significantly lower than the 1990 Particle Data Group world average while the branching ratio to three charged particles is correspondingly higher. The five-prong branching ratio is in agreement with the world average measurement.

AB - The inclusive branching ratios of the τ lepton to one, three and five charged particle final states are measured from data collected with the OPAL detector at LEP. The data sample consists of 12707e+e- → τ+τ- candidate events and has an estimated background of 1.9%. The branching ratios are obtained from a simultaneous fit to the data which gives B1 = 84.48 ± 0.27 (stat) ±0.23 (sys)%, B3 = 15.26±0.26±0.22% and B5 = 0.26±0.06±0.05% respectively where B1 + B3 + B5 is constrained to equal one. The inclusive one-prong branching ratio is found to be significantly lower than the 1990 Particle Data Group world average while the branching ratio to three charged particles is correspondingly higher. The five-prong branching ratio is in agreement with the world average measurement.

UR - https://www.scopus.com/pages/publications/0000490833

U2 - 10.1016/0370-2693(92)91117-R

DO - 10.1016/0370-2693(92)91117-R

M3 - Article

AN - SCOPUS:0000490833

SN - 0370-2693

VL - 288

SP - 373

EP - 385

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 3-4

ER -

Measurement of the τ topological branching ratios at LEP

Abstract

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