SLAC Publication SLAC-PUB-13694
SLAC Release Date: August 3, 2009
Reggeon Non-Factorizability and the J=0 Fixed Pole in DVCS
Brodsky, Stanley J. (SLAC); Llanes-Estrada, Felipe J. (Madrid U.); Londergan, J.Timothy, Szczepaniak, Adam P. (Indiana U.)
We argue that deeply virtual Compton scattering will display Regge behavior V^&/R(t) at high energy at fixed-t, even at high photon virtuality, not necessarily conventional scaling. A way to see this is to track the Reggeon contributions to quark-nucleon scattering and notice that the resulting Generalized Parton Distributions would have divergent behavior at the break–points. In addition, we show that the direct twophoton to quark coupling will be accessible at large t where it dominates the DV...
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We argue that deeply virtual Compton scattering will display Regge behavior V^&/R(t) at high energy at fixed-t, even at high photon virtuality, not necessarily conventional scaling. A way to see this is to track the Reggeon contributions to quark-nucleon scattering and notice that the resulting Generalized Parton Distributions would have divergent behavior at the break–points. In addition, we show that the direct twophoton to quark coupling will be accessible at large t where it dominates the DVCS amplitude for large energies. This contribution, the J = 0 fixed–pole, should be part of the future DVCS experimental programs at Jlab or LHeC.
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Talk given 17th International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2009), Madrid, Spain, 26-30 Apr 2009
Interest Categories: HEP Phenomenology, HEP Theory
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