NNLO Time-like Splitting Functions in QCD

Details NNLO Time-like Splitting Functions in QCD NNLO Time-like Splitting Functions in QCD

2008-07-02

arxiv.org/abs/0807.0321v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages LaTeX, proceedings of the DIS 2008 Workshop, 7-11 April 2008, London

Scientific paper

We review the status of the calculation of the time-like splitting functions for the evolution of fragmentation functions to the next-to-next-to-leading order in perturbative QCD. By employing relations between space-like and time-like deep-inelastic processes, all quark-quark and the gluon-gluon time-like splitting functions have been obtained to three loops. The corresponding quantities for the quark-gluon and gluon-quark splitting at this order are presently still unknown except for their second Mellin moments.

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