Sep 9 – 13, 2019
Europe/Zurich timezone

Threshold effects at next-to-leading power

Sep 10, 2019, 4:00 PM
25m
Cubiculaire

Cubiculaire

Speaker

Mr Jort Sinninghe Damsté (University of Amsterdam)

Description

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