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On Deeply Virtual Compton Scattering at next-to-leading order

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arxiv 1402.0323 v1 pith:QWU2VGJY submitted 2014-02-03 hep-ph hep-exnucl-exnucl-th

On Deeply Virtual Compton Scattering at next-to-leading order

classification hep-ph hep-exnucl-exnucl-th
keywords scatteringcomptoncorrectionsdeeplyvirtualaccessalphasamplitude
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Deeply Virtual Compton Scattering in the near forward kinematic region is the golden access to Generalized Parton Distributions. We studied the O(alphaS) corrections to the scattering amplitude for both spacelike and timelike kinematics relevant respectively to the leptoproduction of a real photon and to the photoproduction of a lepton pair. It turns out that these corrections are phenomenologically important and that the gluonic contributions are by no means negligible, even in the moderate energy range of JLab12 and of the COMPASS-II experiment at CERN.

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