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We argue that at moderately large momentum transfer -t <10 GeV^2, hadronicform factors and wide-angle Compton scattering amplitudes are dominated bymechanism corresponding to overlap of soft wave functions. We show that thesoft contribution in both cases can be described in terms of the same universalnonforward parton densities (ND's) F(x;t), which are the simplest hybrids ofthe usual parton densities and hadronic form factors. We propose a simple modelfor ND's possessing required reduction properties. Our model easily reproducesthe observed magnitude and the dipole t-dependence of the proton form factorF_1^p(t) in the region 1 GeV^2 < -t < 10 GeV^2. Our results for the wide-angleCompton scattering cross section follow the angular dependence of existing dataand are rather close to the data in magnitude.Comment: 16 pages, latex, 10 figures; a few typos are fixe

Nonforward parton densities and soft mechanism for form factors and wide-angle Compton scattering in QCD