Search for the Lepton Flavor Violating Decays B+K+ τ± l (l = e, μ) at Belle

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Date

2023-06-28, 2023-06-28

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Publisher

American Physical Society

Abstract

We present a search for the lepton flavor violating decays B+→K+τ±ℓ∓, with 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. We find no evidence for B±→K±τℓ decays and set upper limits on their branching fractions at the 90% confidence level in the (1-3)×10-5 range. The obtained limits are the world's best results.

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Keywords

Science & Technology, Physical Sciences, Physics, Multidisciplinary, Physics, IDENTIFICATION, Belle Collaboration, 5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 51 Physical Sciences, 40 Engineering, 49 Mathematical sciences

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