Dortmund 2021 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
T: Fachverband Teilchenphysik
T 56: Flavour physics III
T 56.3: Vortrag
Mittwoch, 17. März 2021, 16:30–16:45, Tf
QCD factorization of the four-lepton decay B−→ ℓ νℓ ℓ′ ℓ′ — Martin Beneke1, Philipp Boer1, •Panagiotis Rigatos1, and Keri Vos2 — 1Technical University of Munich — 2Maastricht University
The radiative decay B− → γ ℓ νℓ has been extensively studied in the context of QCD factorization, when the energy of the photon is large compared to the scale of strong interaction ΛQCD. The branching ratio of this decay depends strongly on the first inverse moment of the B meson light-cone distribution amplitude (LCDA), an important, poorly constrained, non-pertubative parameter for the QCD factorization of other hadronic decays. In this work we consider the same decay with an off-shell photon which further decays into a lepton pair (ℓ,ℓ′=e,µ), resulting in the exclusive four lepton decay B−→ ℓ νℓ γ* → ℓ νℓ ℓ′ ℓ′. We investigate whether these decays retain sensitivity on λB and provide decay rate estimates for the case of identical and non-identical leptons.