Fig. 4

Beam helicity-dependent and helicity-independent cross sections. Unpolarized cross sections are represented with black circles and polarized cross sections with black triangles. The kinematic setting shown corresponds to Q ² = 1.75 GeV², x _B = 0.36, and t = −0.30 GeV². The beam energies are E ^beam = 4.455 GeV (a) and E ^beam = 5.55 GeV (b). Bars show s.d. statistical uncertainties, calculated as the squared root of the number of detected events and propagated to the measured cross sections. Dashed lines represent the result of the LT/LO fit with \({\Bbb H}_{ + + }\), \({\Bbb E}_{ + + }\), \(\tilde {\Bbb H}_{ + + }\), and \(\tilde {\Bbb E}_{ + + }\). Solid lines show the result of the HT fit with \({\Bbb H}_{ + + }\), \(\tilde {\Bbb H}_{ + + }\), \({\Bbb H}_{0 + }\), and \(\tilde {\Bbb H}_{0 + }\). Curves for the NLO fit (\({\Bbb H}_{ + + }\), \(\tilde {\Bbb H}_{ + + }\), \({\Bbb H}_{ - + }\), and \(\tilde {\Bbb H}_{ - + }\)) overlap with the HT fit and are not shown. Results of the KM15²⁹ fit to previously published DVCS data are also presented