Toward a NNLO calculation of the B¯→Xsγ decay rate with a cut on photon energy: II. Two-loop result for the jet function

Becher, Thomas; Neubert, Matthias

doi:10.1016/j.physletb.2006.04.046

Title: Toward a NNLO calculation of the B ¯ → X s γ decay rate with a cut on photon energy: II. Two-loop result for the jet function

Journal Article · Wed May 03 00:00:00 EDT 2006 · Physics Letters. B

DOI:https://doi.org/10.1016/j.physletb.2006.04.046· OSTI ID:892345

Becher, Thomas ^[1]; Neubert, Matthias ^[2]

Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Cornell Univ., Ithaca, NY (United States)

The complete two-loop expression for the jet function J(p²,μ) of soft-collinear effective theory is presented, including non-logarithmic terms. Combined with our previous calculation of the soft function S(ω,μ), this result provides the basis for a calculation of the effect of a photon-energy cut in the measurement of the B ¯ → X s γ 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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Research Organization:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), High Energy Physics (HEP)

Grant/Contract Number:: AC02-07CH11359

OSTI ID:: 892345

Report Number(s):: hep-ph/0603140; CLNS-06-1954; FERMILAB-PUB-06-057-T; 712741; TRN: US0701276

Journal Information:: Physics Letters. B, Vol. 637, Issue 4-5; ISSN 0370-2693

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 159 works

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