Hadron collisions and the fifth form factor

Details Hadron collisions and the fifth form factor Hadron collisions and the fifth form factor

2005-08-11

arxiv.org/abs/hep-ph/0508130v2

Phys.Lett. B631 (2005) 118-125

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages

Scientific paper

10.1016/j.physletb.2005.10.009

Logarithmically enhanced effects due to radiation of soft gluons at large angles in $2\to 2$ QCD scattering processes are treated in terms of the "fifth form factor" that accompanies the four collinear singular Sudakov form factors attached to incoming and outgoing hard partons. Unexpected symmetry under exchange of internal and external variables of the problem is pointed out for the anomalous dimension that governs soft gluon effects in hard gluon--gluon scattering.

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