SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 54: Flavor IV
T 54.1: Vortrag
Mittwoch, 22. März 2023, 15:50–16:05, HSZ/0304
Systematic Parametrization of the B-meson Light-Cone Distribution Amplitude — Thorsten Feldmann1, •Philip Lüghausen1, and Danny van Dyk2 — 1Theoretische Physik 1, Universität Siegen, Walter-Flex-Straße 3, D-57068 Siegen, Germany — 2Institute for Particle Physics Phenomenology, Durham University, Durham DH1 3LE, UK
The light-cone distribution amplitude (LCDA) of the B meson provides the essential non-perturbative input in the QCD factorization approach to calculate, for example, the B → γ ℓ ν decay amplitude.
While previous phenomenological analyses were based on specific model assumptions for the LCDA, we propose a systematic parametrization with suitable properties: (1) to extract information about the LCDA from experimental data, (2) to perform analytical calculations in QCD-based approaches, and (3) to obtain numerical estimates for observables with controlled theoretical uncertainties.