Infrared safe definition of jet flavour

Details Infrared safe definition of jet flavour Infrared safe definition of jet flavour

2006-05-25

arxiv.org/abs/hep-ph/0605270v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures, to appear in the proceedings of XLIst Rencontres de Moriond QCD and High Energy Hadronic Interactions, La

Scientific paper

Though it is widely taken for granted that it makes sense to separately discuss quark and gluon jets, normal jet algorithms lead to a net parton-level jet flavour that is infrared (IR) unsafe. This writeup illustrates the problem and explains how the kt algorithm can be modified to provide an IR safe parton-level flavour. As well as being of use in theoretical calculations that require a projection of higher-order contributions onto a flavour-channel of the lowest order, jet-flavour algorithms also open up the prospect of significant improvements in the accuracy of heavy-quark jet predictions.

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