Study of high-multiplicity three-prong and five-prong τ decays at BABAR
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Lees-2012-Study of high-multiplicity three.pdf
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Author(s)
Dujmic, Denis
Sciolla, Gabriella
Cowan, Ray F
Date Issued
November 2012
Journal
Physical Review D
Publisher
American Physical Society
Citation
Lees, J. P. et al. “Study of High-multiplicity Three-prong and Five-prong τ Decays at BABAR.” Physical Review D 86.9 (2012). © 2012 American Physical Society
Version
Final published version
Abstract
We present measurements of the branching fractions of three-prong and five-prong τ decay modes using a sample of 430 million τ lepton pairs, corresponding to an integrated luminosity of 468 fb[superscript -1], collected with the BABAR detector at the PEP-II asymmetric-energy e[superscript +]e[superscript -] storage rings at SLAC National Accelerator Laboratory. The τ[superscript -]→(3π)[superscript -]ην[subscript τ], τ[superscript -]→(3π)[superscript -]ων[subscript τ], and τ[superscript -]→π[superscript -]f[subscript 1](1285)ν[subscript τ] branching fractions are presented, as well as a new limit on the branching fraction of the second-class current decay τ[superscript -]→π-η′(958)ντ. We search for the decay mode τ[superscript -]→K-ητ[superscript ′](958)ντ and for five-prong decay modes with kaons, and place the first upper limits on their branching fractions.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.86.092010
