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Resummation of electroweak Sudakov logarithms for real radiation

Research paper by Christian W Bauer, Nicolas Ferland

Indexed on: 26 Jan '16Published on: 26 Jan '16Published in: High Energy Physics - Phenomenology



Abstract

We show how to resum the electroweak Sudakov logarithms for real radiation of Z or W bosons, using Drell-Yan production p p -> l_1 l_2 V as an example. Using the known resummation of virtual corrections together with knowledge of the leading-log structure of real radiation in a parton shower, we derive analytic expressions for the resummed real radiation after they have been integrated over all of phase space. Performing a numerical analysis for both the 13 TeV LHC and a 100 TeV pp collider, we show that resummation of the real corrections is as important as resummation of the virtual corrections, and that this resummation has a sizable effect for partonic center of mass energies exceeding s = O(few TeV). For partonic center of mass energies s >~ 10 TeV, which can be reached at a 100 TeV collider, resummation becomes an O(1) effect and needs to be included even for rough estimates of the cross-sections.