Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 30: Flavour Physics 3

T 30.4: Vortrag

Dienstag, 22. März 2022, 17:00–17:15, T-H15

Search for the lepton flavour violating decay B⁰ → τ^± ℓ^∓ — •Nathalie Eberlein, Thomas Lück, and Thomas Kuhr — Ludwig- Maximilians-Universität, München

Lepton flavour is conserved in the Standard Model, but violated in many new physics models. An observation of the B⁰ → τ^± ℓ^∓ decay, where ℓ = e/µ, would be a clear sign for new physics.

At B factories one can determine the kinematics of the signal B meson by fully reconstructing the accompanying B meson in e⁺ e⁻ → Υ(4S) → BB events. In the rest frame of the signal B meson the mono-energetic lepton provides a clean signature to identify the signal decays. This talk presents the current status of the search for B⁰ → τ^± ℓ^∓ decays with Belle data using the Full Event Interpretation algorithm for the reconstruction of the accompanying B meson.