Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 7: Flavour physics V

T 7.2: Vortrag

Montag, 15. März 2021, 16:15–16:30, Tg

Study on semileptonic BD** ℓ ν decays for a R(D(*)) measurement at Belle — •Patrick Ecker1, Felix Metzner1, Florian Bernlochner2, and Pablo Goldenzweig11Karlsruher Institut für Technologie — 2Universität Bonn

Measuring the semileptonic ratio R(D(*)) shows an over 3σ tension to the prediction of the standard model. This tension is still one of the most interesting open questions in flavor physics, which makes a more precise measurement of the ratio desirable. Nevertheless, the precision of the measurement is mainly limited by the insufficient knowledge about the BD** ℓ ν background decays.
This study uses the 711 fb−1 dataset provided by Belle to analyse the form factor modeling of these modes, as well as giving ratios of the branching fractions of the D** decays to the BD(*) ℓ ν decays used in the R(D(*)) analysis.

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