Non-global logarithms and jet algorithms in high-pT jet shapes

Abstract

We consider jet-shape observables of the type proposed recently, where the shapes of one or more high-pT jets, produced in a multi-jet event with definite jet multiplicity, may be measured leaving other jets in the event unmeasured. We point out the structure of the full next-to-leading logarithmic resummation specifically including resummation of non-global logarithms in the leading-Nc limit and emphasising their properties. We also point out differences between jet algorithms in the context of soft gluon resummation for such observables.

22 pages, 4 figures. Title and a few words changed. Several typos corrected. Version accepted by JHEP

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