CLAS physics database search results Measurement E216M438 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.517197 0.0341278 0.0871247 54 0.469847 0.0312381 0.05588273 90 0.427078 0.0149681 0.03394194 126 0.430318 0.0116231 0.03235567 162 0.439346 0.0110246 0.0329483 198 0.410721 0.0152615 0.0322872 234 0.386697 0.0111953 0.031649 270 0.417692 0.0137614 0.03347701 306 0.429977 0.015931 0.04653983 342 0.425852 0.0361988 0.08273352