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Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 23: Top physics 1

T 23.6: Talk

Monday, March 4, 2024, 17:15–17:30, Geb. 30.95: Audimax

NNLO soft function for 0-jettiness in (associated) tt productionGuido Bell1, Alessandro Broggio2, Bahman Dehnadi3, •Sebastian Edelmann1, Matthew A. Lim4, and Rudi Rahn51Theoretische Teilchenphysik, Center for Particle Physics, Universität Siegen, Siegen, Germany — 2Faculty of Physics, University of Vienna, Wien, Austria — 3Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 4Department of Physics and Astronomy, University of Sussex, Sussex House, Brighton, UK — 5Department of Physics and Astronomy, University of Manchester, Manchester, UK

In order to compare theoretical predictions to the exceptionally accurate LHC data, it is essential to have a thorough understanding of tt and tt X production cross sections, where X= γ, W, Z, H. Since jettiness slicing has already been successfully applied to compute NNLO corrections including massless partons, our aim is to develop this method for processes that include top quarks. At small values of the 0-jettiness variable, it can be shown that the cross section factorizes into hard, beam, and soft functions. While beam functions are universal and known from massless calculations, our focus consists in computing the relevant soft functions for massive partons. We have already automated the calculation of the real-virtual contribution to the tt soft function, utilizing a generic measurement function, that includes all information about the observables, and performing numerical integration over the remaining phase-space variables. This calculation will lay the groundwork for implementing associated tt production processes in the Monte-Carlo event generator GENEVA.

Keywords: Soft-Collinear Effective Theory; Top-Physik; QCD; Collider Physik

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