Sep 9 – 13, 2019
Europe/Zurich timezone

Threshold effects at next-to-leading power

Sep 10, 2019, 4:00 PM



Mr Jort Sinninghe Damsté (University of Amsterdam)


In QCD, soft radiation plays an important role in kinematic regions where resulting threshold logarithms become large. In this talk, I address such effects beyond leading power in the threshold expansion, for both fixed order and resummed results. For the double-real single-virtual correction to Drell-Yan, a large class of next-to-leading power (NLP) threshold logarithms is shown
to be obtained using the method of regions [1]. For more general processes with a colour singlet final state, leading logarithms at NLP are resummed by dressing the shifted Born level cross section with exponentiated LP webs [2].

[1] N. Bahjat-Abbas, J. Sinninghe Damsté, L. Vernazza and C. D. White, “On next-to-leading
power threshold corrections in Drell-Yan production at N3LO”, JHEP
10 (2018) 144, 1807.09246.

[2] N. Bahjat-Abbas, D. Bonocore, J. Sinninghe Damsté, E. Laenen, L. Magnea, L. Vernazza and
C. D. White, “Diagrammatic resummation of leading-logarithmic threshold effects at next-to-leading
power”, 1905.13710.

Primary authors

Chris White (Queen Mary University of London) Domenico Bonocore (Westfälische Wilhelms-Universität Münster) Eric Laenen (Nikhef National institute for subatomic physics (NL)) Mr Jort Sinninghe Damsté (University of Amsterdam) Dr Leonardo Vernazza (Nikhef and University of Amsterdam) Lorenzo Magnea (Universita e INFN (IT)) Ms Nadia Bahjat-Abbas (Queen Mary University London)

Presentation materials