Journal
PHYSICS LETTERS B
Volume 497, Issue 3-4, Pages 228-234Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0370-2693(00)01344-7
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The soft-gluon resummation exponents GN in moment space are investigated for the quark coefficient functions in deep-inelastic structure functions and the quark-antiquark contribution to the Drell-Yan cross section d sigma /dM. Employing results from two- and three-loop calculations we obtain the next-to-next-to-leading logarithmic terms alpha (s) (alpha (s) ln N)(n) of G(N) to all orders in the strong coupling constant alpha (s). These new contributions facilitate a reliable assessment of the numerical effect and the stability of the large-N expansion. (C) 2001 Elsevier Science B.V. All rights reserved.
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