Observation of Υ(3S)→τ+τ- and Tests of Lepton Universality in Υ Decays
- D. Besson,
- T. K. Pedlar,
- D. Cronin-Hennessy,
- K. Y. Gao,
- D. T. Gong,
- J. Hietala
- University of Kansas,
- Luther College, Decorah,
- University of Minnesota Twin Cities,
- Northwestern University,
- SUNY Albany,
- University of Oklahoma
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citations
32
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1.06
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128
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73
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32
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14
Abstract
Using data collected with the CLEO III detector at the CESR e+e- collider, we report on a first observation of the decay Υ(3S)→τ+τ-, and precisely measure the ratio of branching fractions of Υ(nS), n=1, 2, 3, to τ+τ- and μ+μ- final states, finding agreement with expectations from lepton universality. We derive absolute branching fractions for these decays, and also set a limit on the influence of a low mass CP-odd Higgs boson in the decay of the Υ(1S).
Publication Information
Output type
Research Output:
Contribution to journal
Article
Research
Peer-reviewOriginal language
EnglishArticle number
052002Journal (Volume, Issue Number)
Physical Review Letters (Volume 98, Issue 5)Publication milestones
- Published - 05/02/2007
Publication status
Published - 05/02/2007
ISSN
0031-9007Publication IDs
- researchoutputwizard: 33846631930
- Scopus: 33846631930
- Mendeley: 25cfdaaf-40e9-3dfd-a1b0-ddd6e26fb676
- WOS: 000244646100021