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Toward a NNLO calculation of the B-->X_s+gamma decay rate with a cut on photon energy: II. Two-loop result for the jet function

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arxiv hep-ph/0603140 v2 pith:K6YLJ56V submitted 2006-03-18 hep-ph

Thomas Becher (Fermilab) , Matthias Neubert (Cornell University) This is my paper · ORCID
classification hep-ph
keywords functioncalculationdecaygammarateresulttheorytwo-loop
verification ladder T0 review T1 audit T2 compute T3 formal
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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-->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.

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Forward citations

Cited by 7 Pith papers

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