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T: Fachverband Teilchenphysik
T 84: Flavour Physics
T 84.3: Talk
Thursday, March 24, 2022, 16:45–17:00, T-H15
Exclusive B → Xu ℓ νℓ Decays with Hadronic Tagging in Belle II Data — •Moritz Bauer, Pablo Goldenzweig, and Torben Ferber for the Belle II collaboration — KIT, Karlsruhe, Germany
There has been a longstanding 3σ tension between inclusive and exclusive measurements of the magnitude of the CKM matrix element Vub. Semileptonic decays involving b→ u transitions present a unique opportunity to measure Vub with the current Belle II dataset due to their comparatively high branching fraction.
We present analyses of the semileptonic processes B→πℓνℓ and B→ρℓνℓ in Belle II data as steps towards the extraction of this matrix element from exclusive decays. These analyses are conducted with hadronic tagging, utilizing a new tagging algorithm, the Full Event Interpretation.