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A search for the decay modes B+/- to h+/- tau l

Authors
  • Lees, J.P.
  • Poireau, V.
  • Tisserand, V.
  • Bernard, D.
  • Verderi, M.
  • Emery, S.
  • Hamel De Monchenault, G.
  • Vasseur, G.
  • Yèche, Ch.
  • Arnaud, N.
  • Davier, M.
  • Derkach, D.
  • Grosdidier, G.
  • Le Diberder, F.
  • M. Lutz, A.
  • Malaescu, B.
  • Roudeau, P.
  • H. Schune, M.
  • Stocchi, A.
  • Wormser, G.
Publication Date
Jan 01, 2012
Source
HAL-UPMC
Keywords
Language
English
License
Unknown
External links

Abstract

We present a search for the lepton flavor violating decay modes B+/- to h+/- tau l (h= K,pi; l= e,mu) using the BaBar data sample, which corresponds to 472 million BBbar pairs. The search uses events where one B meson is fully reconstructed in one of several hadronic final states. Using the momenta of the reconstructed B, h, and l candidates, we are able to fully determine the tau four-momentum. The resulting tau candidate mass is our main discriminant against combinatorial background. We see no evidence for B+/- to h+/- tau l decays and set a 90% confidence level upper limit on each branching fraction at the level of a few times 10^-5.

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