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T: Fachverband Teilchenphysik

T 54: Invited Topical Talks 3

T 54.2: Invited Topical Talk

Wednesday, March 23, 2022, 11:25–11:50, T-H15

Precision tests of the Standard Model using CP violation in B meson decays — •Thibaud Humair for the Belle II collaboration — Max Planck Institute for Physics, Föhringer Ring 6, 80805 Munich

One of the main goals of the Belle II physics program is to test the flavour sector of the Standard Model to very high precision by measuring the parameters of the CKM triangle, which governs quark mixing. This talk focuses on the measurements of two of these parameters: the angles alpha and beta.

The angle alpha requires to measure direct CP violation in various charmless, rare, modes. These modes require excellent performances in background reduction and in the reconstruction of neutrals. The angle beta is accessed through time-dependent measurements of CP violation. These measurements require a very good B vertex resolution, excellent flavour tagging capabilities and a perfect understanding of the detector response. I will present recent Belle II results in both types of measurements, and discuss the future prospects for analyses of highest possible precision.

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