Journal
NUCLEAR PHYSICS B
Volume 731, Issue 1-2, Pages 85-108Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nuclphysb.2005.07.036
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We prove the all-order exponentiation of soft logarithmic corrections to prompt photon production in hadronic collisions, by generalizing an approach previously developed in the context of Drell-Yan production and deep-inelastic scattering. We show that all large logs in the soft limit can be expressed in terms of two dimensionful variables, and we use the renormalization group to resum them. The resummed results that we obtain are more general though less predictive than those proposed by other groups, in that they can accommodate for violations of Sudakov factorization. (c) 2005 Elsevier B.V. All rights reserved.
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