Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
Scaling Tests of the Cross Section for Deeply Virtual Compton Scattering
We present the first measurements of the →ep→epγ cross section in the deeply virtual Compton scattering (DVCS) regime and the valence quark region. The Q2 dependence (from 1.5 to 2.3 GeV2) of the helicity-dependent cross section indicates the twist-2 dominance of DVCS, proving that generalized parton distributions (GPDs) are accessible …