Recent Belle II results related to 𝑩 anomalies

Sumitted to PubDB: 2023-10-13

Category: Proceeding, Visibility: Public

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Authors	Yulan Fan
Date	Oct. 13, 2023
Belle II Number	BELLE2-CONF-PROC-2023-038
Abstract	Semileptonic 𝐵-meson decays involving the quark transition 𝑏 → 𝑐𝑙𝜈 provide excellent sensitivity to probe potential lepton-flavour universality violation. This work introduces two recent measurements related to tests of light-lepton flavour universality using a data sample collected at the Υ(4𝑆) resonance on the Belle II experiment corresponding to an integrated luminosity of 189/fb. Measurement of the ratio of the branching fractions of inclusive 𝐵 → 𝑋𝑒𝜈_𝑒 and 𝐵→ 𝑋 𝜇𝜈_𝜇 decays and measurement of angular asymmetries of 𝐵0 → 𝐷∗− 𝑙𝜈 decays agree well with standard model expectation.