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Probing photon structure in DVCS on a photon target
classification
✦ hep-ph
keywords
gammaphotondvcsgeneralizedallowingamplitudeamplitudesanomalous
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The factorization of the amplitude for the deeply virtual Compton scattering (DVCS) process gamma*(Q) gamma -> gamma gamma at high Q2 is demonstrated in two distinct kinematical domains, allowing to define the photon generalized parton distributions and the diphoton generalized distribution amplitudes. Both these quantities exhibit an anomalous scaling behaviour and obey new inhomogeneous QCD evolution equations.
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