Heidelberg 2022 – scientific programme
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T: Fachverband Teilchenphysik
T 84: Flavour Physics
T 84.4: Talk
Thursday, March 24, 2022, 17:00–17:15, T-H15
Tagged analysis of B→ρ0ℓν, B→ρ+ℓν and B→ωℓν — Armindokht Afsharipour, Florian Bernlochner, Jochen Dingfelder, Svenja Granderath, Peter Lewis, and •Rieka Rittsteiger for the Belle collaboration — Physikalisches Institut der Rheinischen Friedrich-Wilhelms-Universität Bonn
We present a study of the charmless semileptonic decays B→ρ0ℓν, B→ρ+ℓν and B→ωℓν, where ℓ is an electron or a muon, with the Belle experiment at KEK in Tsukuba, Japan. Belle took data from 1999 until 2010 at a center-of-mass energy corresponding to the mass of the Υ(4S), which predominantly decays into a pair of B mesons. The Full Event Interpretation is used to fully reconstruct one B meson in a hadronic decay mode. The signal B meson is reconstructed from a lepton and the respective hadron (ρ, ω) using the remaining tracks and neutral clusters in the event. The precise knowledge of the tag-side B decay leads to a good signal-to-background ratio but also a very small efficiency.
In this talk the analysis strategy and status of the B→ρ0ℓν, B→ρ+ℓν and B→ωℓν analysis using hadronic B-tagging at Belle are presented.