Non-abelian infra-red cancellations in the unintegrated NLO kernel

Details Non-abelian infra-red cancellations in the unintegrated NLO kernel Non-abelian infra-red cancellations in the unintegrated NLO kernel

2009-05-10

arxiv.org/abs/0905.1403v1

Acta Phys.Polon.B40:2097-2108,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 8 figures

Scientific paper

We investigate the infrared singularity structure of Feynman diagrams entering the next-to-leading-order (NLO) DGLAP kernel (non-singlet). We examine cancellations between diagrams for two gluon emission contributing to NLO kernels. We observe the crucial role of color coherence effects in cancellations of infra-red singularities. Numerical calculations are explained using analytical formulas for the singular contributions.

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