Erlangen 2026 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 29: Flavour Physics II
T 29.2: Vortrag
Dienstag, 17. März 2026, 16:30–16:45, KH 01.011
Electromagnetic corrections to leptonic charm decays — •Aritra Biswas1, Max Ferre2, Jack Jenkins1, and Ipsita Ray3 — 1University of Siegen, Siegen, Germany — 2Johannes Gutenberg University, Mainz, Germany — 3University of Montreal, Montreal, Canada
We investigate the soft photon energy spectrum of leptonic charm decays D(s)→ lν(γ), l=µ,τ at fixed order in the electromagnetic coupling, including hadronic substructure effects that are the dominant sources of theoretical uncertainty. We address the different scales involved in the problem with respect to the heavy and light leptonic final states. We find that the leading electromagnetic corrections are comparable to the experimental precision at BESIII in general. We also incorporate the effect of these corrections on model dependent/independent constraints in BSM scenarios and comment on the shift in the corresponding parameter space resulting from the inclusion of these corrections in the Standard Model estimate.
Keywords: Charm Physics; Leptonic Decays; D decays; QED corrections; Charged current decays