Continuity of generalized parton distributions for the pion virtual Compton scattering

Details Continuity of generalized parton distributions for the pion virtual Compton scattering Continuity of generalized parton distributions for the pion virtual Compton scattering

2002-04-28

arxiv.org/abs/hep-ph/0204321v2

Phys.Rev. D66 (2002) 053011

Physics

High Energy Physics

High Energy Physics - Phenomenology

14 pages, 9 figures, we (1) changed the title, (2) added references, (3) discussed the GPD value at the crossover in Sec. III,

Scientific paper

10.1103/PhysRevD.66.053011

We discuss a consistent treatment of the light-front gauge-boson and meson wave functions in the analyses of the generalized parton distributions(GPDs) and the scattering amplitudes in deeply virtual Compton scattering(DVCS) for the pion. The continuity of the GPDs at the crossover, where the longitudinal momentum fraction of the probed quark is same with the skewedness parameter, and the finiteness of the DVCS amplitude are ensured if the same light-front radial wave function as that of the meson bound state wave function is used for the gauge boson bound state arising from the pair-creation(or nonvalence) diagram. The frame-independence of our model calculation is also guaranteed by the constraint from the sum rule between the GPDs and the form factors.

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