We present a search for the lepton flavor violating decay modes B±→h±τℓ (h=K, π; ℓ=e, μ) using the BABAR data sample, which corresponds to 472×106 BB⎯⎯⎯ 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 τ four-momentum. The resulting τ candidate mass is our main discriminant against combinatorial background. We see no evidence for B±→h±τℓ decays and set a 90% confidence level upper limit on each branching fraction at the level of a few times 10−5.

Search for the decay modes B^{±}→h^{±}τℓ

LANCERI, LIVIO;VITALE, LORENZO;
2012-01-01

Abstract

We present a search for the lepton flavor violating decay modes B±→h±τℓ (h=K, π; ℓ=e, μ) using the BABAR data sample, which corresponds to 472×106 BB⎯⎯⎯ 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 τ four-momentum. The resulting τ candidate mass is our main discriminant against combinatorial background. We see no evidence for B±→h±τℓ 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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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11368/2767750
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