Wuppertal 2015 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 33: Flavourphysik 1 (Theorie)
T 33.5: Vortrag
Montag, 9. März 2015, 17:45–18:00, K.12.20 (K2)
Updating the light-cone sum rules for the B→ π form factor — Sentitemsu Imsong, Alexander Khodjamirian, Thomas Mannel, and •Danny van Dyk — Universität Siegen
The B→ π vector form factor is needed for various phenomenological applications, including — but not limited to — the determination of the CKM matrix element Vub, and theory predictions for the rare decay B→ πℓ+ℓ− in the Standard Model and beyond. We update the results for this form factor in the framework of light-cone sum rules. Our study differs from previous works by the application of a rigorous statistical treatment of parametric uncertainties, both for the form factor results as well as for their extrapolation toward large momentum transfer. We further give an outlook how the leading systematic uncertainties can be estimated.