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Abstract: We argue that deeply virtual Compton scattering will display Regge behaviornu^alpha Rt at high energy at fixed-t, even at high photon virtuality, notnecessarily conventional scaling. A way to see this is to track the Reggeoncontributions to quark-nucleon scattering and notice that the resultingGeneralized Parton Distributions would have divergent behavior at thebreak-points. In addition, we show that the direct two-photon to quark couplingwill be accessible at large $t$ where it dominates the DVCS amplitude for largeenergies. This contribution, the J=0 fixed-pole, should be part of the futureDVCS experimental programs at Jlab or LHeC.



Author: Stanley J. Brodsky, Felipe J. Llanes-Estrada, J. Timothy Londergan, Adam P. Szczepaniak

Source: https://arxiv.org/







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