Journal
PHYSICS LETTERS B
Volume 631, Issue 3, Pages 118-125Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2005.10.009
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Logarithmically enhanced effects due to radiation of soft gluons at large angles in 2 -> 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. (c) 2005 Elsevier B.V. All rights reserved.
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