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  • Search for ▫$B^0_s$▫ ▫$\to \ell^\mp \pi\pm$▫ with the semi-leptonic tagging method at Belle
    Nayak, L. ...
    We present a search for the lepton-flavor-violating decays → ℓ∓τ±, where ℓ = e, μ, using the full data sample of 121 fb−1 collected at the Υ(5S) resonance with the Belle detector at the KEKB ... asymmetric-energy e+e− collider. We use events in which one meson is reconstructed in a semileptonic decay mode and the other in the signal mode. We find no evidence for → ℓ∓τ± decays and set upper limits on their branching fractions at 90% confidence level as ( → e∓τ±) < 14 × 10−4 and ( → μ∓τ±) < 7.3 × 10−4. Our result represents the first upper limit on the → e∓τ± decay rate.
    Vir: The journal of high energy physics [Elektronski vir]. - ISSN 1029-8479 (Vol. 2023, article number 178, 2023, str. 1-11)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2023
    Jezik - angleški
    COBISS.SI-ID - 197553155

    Povezava(-e):

    https://link.springer.com/article/10.1007/JHEP08(2023)178
    DOI

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