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

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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Submitted on : Monday, April 16, 2012 - 11:13:07 AM
Last modification on : Friday, October 7, 2022 - 3:46:44 AM

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J.P. Lees, V. Poireau, V. Tisserand, D. Bernard, M. Verderi, et al.. A search for the decay modes B+/- to h+/- tau l. Physical Review D, 2012, 86, pp.012004. ⟨10.1103/PhysRevD.86.012004⟩. ⟨in2p3-00687971⟩



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