Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 71: Theorie: Flavorphysik

T 71.3: Talk

Wednesday, March 27, 2019, 16:30–16:45, H11

D-Wave Contributions in B_l4 Decays — •Stephan Kürten¹ and Bastian Kubis² — ¹Physik Department, Technische Universität München, James-Franck-Straße 1, D-85748 Garching, Germany — ²HISKP, Universität Bonn, Nussallee 14-16, D-53115 Bonn, Germany

Semileptonic b→ u transitions are used to further refine the Cabbibo-Kobayashi-Maskawa matrix element |V_ub|. Previously, extractions of |V_ub| from B→ρ(→π π)lν only assumed P-wave dominance of the decay distribution. For precision determinations, we need to understand the composition of the ππ partial waves at a precision level, which includes S-wave and D-wave contributions. This talk focuses on the methods and the actual comparison between the ρ(770) and f₂(1270) as first resonances in their respective partial waves.