Test of two new parametrizations of the generalized parton distribution H

In 2011 Radyushkin outlined the practical implementation of the one-component double distribution formalism in realistic generalized parton distribution models. We compare the one-component double distribution framework to the standard one and compute deeply virtual Compton scattering observables for both. In particular, the new implementation is more flexible, offering a greater range of variation of the real and imaginary parts of the associated Compton form factor while still allowing the recovery of results similar to the classical approach. Moreover, the polynomiality property is satisfied up to the highest order. Although the comparison to experimental data may be improved, the one-component double distribution modeling is thus an attractive alternative.