First results on $V_{ub}$ and $V_{cb}$ with Belle II

Sumitted to PubDB: 2020-08-04

Category: Talk, Visibility: Public

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Authors
Non-Belle II authors	Racha Cheaib
Date	2020-07-28
Belle II Number	BELLE2-TALK-CONF-2020-041
Abstract	Precision measurements of 𝑉𝑢𝑏 and 𝑉𝑐𝑏 play a central role in precision tests of the CKM sector of the Standard Model and complement direct measurements of CP violation of B meson decays. In this talk, we present first studies for measuring 𝑉𝑢𝑏 and 𝑉𝑐𝑏 with semileptonic decays using collision events recorded at the Υ(4𝑆) resonance by the Belle II experiment. Belle II is located at the SuperKEKB accelerator complex near Tokyo in Japan, and started recording collision data in Spring 2019. We report the status of measuring branching fractions and kinematic properties of inclusive and exclusive 𝑏→𝑐ℓ𝜈¯ℓ and 𝑏→𝑢ℓ𝜈¯ℓ decays using untagged and tagged approaches and the full available Belle II data set.
Conference	40th International Conference on High Energy Physics