16-18 October 2023
Campus Unteres Schloss | University of Siegen
Europe/Berlin timezone

Subleading effects in soft-gluon emission at one-loop in QCD

17 Oct 2023, 15:00
30m
Seminarzentrum (Campus Unteres Schloss | University of Siegen)

Seminarzentrum

Campus Unteres Schloss | University of Siegen

Obergraben 25 57072 Siegen

Speaker

Felix Eschment (RWTH Aachen - TTK)

Description

While the knowledge of the leading-power behaviour of QCD amplitudes in the soft limit is crucial for the construction of subtraction schemes, next-to-leading power (NLP) results can be used to increase precision, which has successfully been applied to QED calculations. In this talk, I will present a universal expression for the soft limit of one-loop QCD amplitudes at NLP, that is, an extension of the LBK theorem to the loop level. The calculation was done with the Expansion by Regions method. An NLP collinear expression for general tree-level amplitudes was obtained along the way while analysing the collinear region.

Primary authors

Felix Eschment (RWTH Aachen - TTK) Tom Schellenberger (RWTH Aachen) Prof. Michal Czakon (RWTH Aachen)

Presentation Materials

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