We present a search for the lepton-flavor-violating decays B0→τ±∓, where ℓ=(e,μ), using the full data sample of 772×106 BB¯ pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. The τ± lepton is reconstructed indirectly using the momentum of the reconstructed B and that of the ∓ from the signal decay. We find no evidence for B0→τ±∓ decays and set upper limits on their branching fractions at 90% confidence level of B(B0→τ±μ∓)<1.5×10-5 and B(B0→τ±e∓)<1.6×10-5.

Search for B0 →τ±ℓ∓ (ℓ=e, μ) with a hadronic tagging method at Belle / Belle, Collaboration; Campajola, M.; De Nardo, G.; Di Capua, F.; Merola, M.; Pardi, S.; Russo, G.; Et, Al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:9(2021). [10.1103/PhysRevD.104.L091105]

Search for B0 →τ±ℓ∓ (ℓ=e, μ) with a hadronic tagging method at Belle

Campajola M.;De Nardo G.;Di Capua F.;Merola M.;Pardi S.;Russo G.;
2021

Abstract

We present a search for the lepton-flavor-violating decays B0→τ±∓, where ℓ=(e,μ), using the full data sample of 772×106 BB¯ pairs recorded by the Belle detector at the KEKB asymmetric-energy e+e- collider. We use events in which one B meson is fully reconstructed in a hadronic decay mode. The τ± lepton is reconstructed indirectly using the momentum of the reconstructed B and that of the ∓ from the signal decay. We find no evidence for B0→τ±∓ decays and set upper limits on their branching fractions at 90% confidence level of B(B0→τ±μ∓)<1.5×10-5 and B(B0→τ±e∓)<1.6×10-5.
2021
Search for B0 →τ±ℓ∓ (ℓ=e, μ) with a hadronic tagging method at Belle / Belle, Collaboration; Campajola, M.; De Nardo, G.; Di Capua, F.; Merola, M.; Pardi, S.; Russo, G.; Et, Al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 104:9(2021). [10.1103/PhysRevD.104.L091105]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/880062
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