Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 104: Flavor VIII
T 104.5: Talk
Thursday, March 23, 2023, 16:50–17:05, HSZ/0304
B → ρ ℓ νℓ Decays with Hadronic Tagging in Belle II Data — •Moritz Bauer, Torben Ferber, and Pablo Goldenzweig — Karlsruhe Institute of Technology (KIT)
Over the last 10 years, a 3 σ tension between inclusive and exclusive measurements of the magnitude of the CKM matrix element Vub has become apparent in multiple experiments. Semileptonic decays involving b→ u quark 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 B→ρℓνℓ decays in Belle II data as steps towards the extraction of this matrix element from exclusive decays. These analyses are conducted with hadronic tagging, an approach in which the second B meson in Υ(4S) decays is reconstructed in a wide variety of hadronic decay chains to increase the selection purity and obtain the recoil of the B-meson decay of interest. This is achieved using a multivariate analysis method, the Full Event Interpretation.