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T: Fachverband Teilchenphysik

T 30: Flavor physics: Lepton universality tests II

T 30.5: Vortrag

Dienstag, 31. März 2020, 18:00–18:15, H-HS XIII

Analysis of B_s,d⁰→µ⁺µ⁻ decays with the full LHCb dataset — Johannes Albrecht, •Maik Becker, and Titus Mombächer — Experimentelle Physik 5, TU Dortmund

The first observation of the decay B_s⁰→µ⁺µ⁻ with a single experiment was reported by the LHCb collaboration in 2017 with a significance of 7.8σ using data corresponding to 4.4 fb⁻¹ of integrated luminosity. The measurement demonstrated the excellent sensitivity of the LHCb experiment in this channel, but no deviations from the Standard Model predictions were found, introducing strong constraints to New Physics models. Since the uncertainty on the result is driven by statistical limitations, an analysis with a larger dataset and improved methods is performed, which may also allow for the first observation of the decay B_d⁰→µ⁺µ⁻.

In this talk the ongoing measurement of B_s,d⁰→µ⁺µ⁻ with the full LHCb dataset corresponding to 9 fb⁻¹ will be presented. A focus is set on efficiencies and data-based validations.