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T: Fachverband Teilchenphysik

T 81: Flavour physics IV

T 81.4: Vortrag

Donnerstag, 18. März 2021, 16:45–17:00, Tf

Test of lepton flavour universality with b → s ℓℓ decays at the LHCb experiment — Johannes Albrecht, Vitalii Lisovskyi, and •Alex Seuthe — Technische Universität Dortmund

Current measurements of the LHCb experiment hint to deviations from Standard Model predictions in tests of lepton flavour universality. Examples for this are the measurements of R_K^*0 and R_K, the ratios of the branching fractions of the decays B⁰ → K^*0 µ⁺ µ⁻ and B⁰ → K^*0 e⁺ e⁻, and B⁺ → K⁺ µ⁺ µ⁻ and B⁺ → K⁺ e⁺ e⁻, respectively. For conclusive results the measurements have to include the full LHCb dataset. In this talk the updated simultaneous measurement of R_K^*0 and R_K, which is currently under preparation, is presented.