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  • Search for charged-lepton flavor violation in ▫$\Upsilon(2S) \to \ell^\mp\tau^\pm$▫ (▫$\ell=e,\mu$▫) decays at Belle
    Dhamija, R. ...
    We report a search for the charged-lepton flavor violation in Υ(2S) → ℓ∓τ± (ℓ = e, μ) decays using a 25 fb−1 Υ(2S) sample collected by the Belle detector at the KEKB e+e− asymmetric-energy collider. ... We find no evidence for a signal and set upper limits on the branching fractions ( ) at 90% confidence level. We obtain the most stringent upper limits: (Υ(2S) → μ∓τ±) < 0.23 × 10−6 and (Υ(2S) → e∓τ±) < 1.12 × 10−6.
    Vir: The journal of high energy physics [Elektronski vir]. - ISSN 1029-8479 (Vol. 2024, article number 187, 2024, str. 1-10)
    Vrsta gradiva - e-članek ; neleposlovje za odrasle
    Leto - 2024
    Jezik - angleški
    COBISS.SI-ID - 196313859