Journal
PHYSICS LETTERS B
Volume 637, Issue 4-5, Pages 251-259Publisher
ELSEVIER
DOI: 10.1016/j.physletb.2006.04.046
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The complete two-loop expression for the jet function J(p(2), mu) of soft-collinear effective theory is presented, including non-logarithmic terms. Combined with our previous calculation of the soft function S(omega, mu), this result provides the basis for a calculation of the effect of a photon-energy cut in the measurement of the (B) over bar -> X-s gamma decay rate at next-to-next-to-leading order in renormalization-group improved perturbation theory. The jet function is also relevant to the resummation of Sudakov logarithms in other hard QCD processes. (c) 2006 Elsevier B.V. All rights reserved.
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