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T: Fachverband Teilchenphysik

T 64: Flavor Physik II

T 64.3: Talk

Wednesday, March 21, 2018, 17:00–17:15, Z6 - SR 2.006

Measurement of the inclusive semileptonic branching fraction of B mesons — Jochen Dingfelder¹, Florian Bernlochner², Stephan Duell¹, and •Tarek El Rabbat¹ — ¹Rheinische Friedrich-Wilhelms-Universität Bonn — ²Karlsruher Institut für Technologie

In this talk, we present an analysis of semileptonic B decays to measure the inclusive branching fraction B(B→ X l ν). The analysis uses events with two semileptonic B decays. Charge and angular correlations between a high momentum lepton and the second lepton are used to separate semileptonic B decays from secondary leptons. The analysis is based on the full data sample (711.0 fb⁻¹) collected at the Υ(4S) resonance with the Belle detector at the KEKB collider. The analysis is performed using the Belle II Analysis Software Framework (BASF2). We will present the status of the analysis and the expected precision of the branching fraction measurement.