Dortmund 2021 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 1: QCD and electroweak interactions (theory)
T 1.6: Vortrag
Montag, 15. März 2021, 17:15–17:30, Ta
Charm quark mass effects to Upsilon decays — Matthias Steinhauser1, Jan Piclum2, Kay Schönwald1, Matteo Fael1, and •Manuel Egner1 — 1Karlsruher Institut für Technologie — 2Universität Siegen
The decay of the Υ(1S) meson is described within non-relativistic QCD where an important building block is given by the matching coefficient of the vector current. We compute two-loop corrections to this quantity for bottom quarks including the dependence of the charm quark mass. Details to the calculation are provided. In the second part of the talk we will discuss the decay of the Υ(1S) meson into leptons including perturbative corrections up to order αs3. Full charm quark mass dependence is taken into account up to order αs2.