Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 91: Standard model 3 (strong/QCD)
T 91.7: Talk
Thursday, March 7, 2024, 17:30–17:45, Geb. 30.23: 2/0
Three-loop heavy-to-light form factors in QCD — Robin Brüser2, Tobias Huber1, •Jakob Müller1, and Maximilian Stahlhofen2 — 1Theoretische Teilchenphysik, Center for Particle Physics Siegen, Universität Siegen — 2University of Freiburg
Precision calculations require the evaluation of higher orders in the perturbative expansion of quantum field theory. In this talk, we discuss the computation of form factors for decays of heavy into light quarks at third order in QCD for various currents. We describe the generation and simplification of the corresponding Feynman diagrams and the integration-by-parts reduction to a finite basis of master integrals. Further, we report on the status of the calculation of the master integrals and give an outlook on the phenomenological applications of the results.
Keywords: Higher order corrections; Form factors; Loop integrals