Super-leading logarithms in non-global observables in QCD: Fixed order calculation
James Keates, Michael H. Seymour
TL;DR
This paper recalculates the first super-leading logarithmic contribution to non-global QCD observables, specifically the gaps between jets cross-section, using a fixed order diagrammatic approach, including the fifth order in alpha_s.
Contribution
It provides the first fixed order calculation of super-leading contributions at fifth order in alpha_s for non-global observables in QCD.
Findings
Identified super-leading logarithmic terms in the gaps between jets cross-section.
Performed a fixed order diagrammatic calculation up to fifth order in alpha_s.
Confirmed the presence of super-leading contributions at higher orders.
Abstract
Super-leading logarithmic terms have previously been observed in non-global QCD observables. In this paper we re-calculate the first super-leading contribution to the `gaps between jets' cross-section using a diagrammatic fixed order approach. We calculate for the first time the super-leading contribution at fifth order in alpha_s.
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