Fig. 5
From: A glimpse of gluons through deeply virtual compton scattering on the proton
A generalized Rosenbluth separation. DVCS2 and DVCS-BH interference contributions are shown at Q 2 = 1.75 GeV2, x B = 0.36, t = −0.30 GeV2, and E beam = 5.55 GeV for the helicity-independent (a) and helicity-dependent (b) cross sections. Solid and dotted lines represent these contributions for the twist-3 (HT) scenario; dashed and dashed-dotted lines correspond to the NLO scenario. Bands show s.d. statistical uncertainties. A DVCS2 contribution appears in the helicity-dependent cross section only if there is a contribution from the longitudinal polarization of the virtual photon (HT scenario)
