Leonardo Vernazza (CERN, INFN - Sezione di Torino) - Threshold resummation of new partonic channels at next-to-leading power

Friday 8 Oct 2021, 14:00 → 16:00 Europe/Zurich

4/3-006 - TH Conference Room (CERN)

Collider observables involving heavy particles are subject to large logarithmic terms near threshold, which must be summed to all orders in perturbation theory to obtain sensible results. Relatively recently, this resummation has been extended to next-to-leading power in the threshold variable, using a variety of approaches. In this talk I will focus on partonic channels that turn on only at next-to-leading power. I will show how to resum leading logarithms within an effective theory approach based on SCET, and by using well-established diagrammatic techniques in Quantum Chromodynamics. I will focus first on deep inelastic scattering and then consider the quark-gluon channel in Drell-Yan and Higgs boson production, showing that an explicit all-order form for the leading logarithmic partonic cross section can be obtained. The results agree with previous conjectures based on fixed-order results.

CERN-2021.pdf