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Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 46: Theorie: QCD

T 46.1: Talk

Tuesday, March 26, 2019, 16:00–16:15, ST 8

Resonance-Aware Subtraction in the Dipole Methode — •Sebastian Liebschner1, Frank Siegert1, and Stefan Höche21Institut für Kern- und Teilchenphysik, TU Dresden, 01069 Dresden, Germany — 2SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA

NLO-subtraction schemes such as CS-dipole-subtraction are indispensable for MC-Generators to calculate real and virtual corrections efficiently. However, those algorithms suffer from numerical inefficiencies and even cause distortions in physical distributions when interfaced with parton showers, if the process in question comprises potentially resonant particles. In this talk I will elucidate this matter and offer an alternative subtraction-scheme, which makes use of so called pseudo-dipoles. I will show results, which have been calculated with a SHERPA-implementation of this new pseudo-dipole-subtraction and compare them to the ones obtained with ordinary CS-dipole-subtraction.

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