CLAS physics database search results Measurement E216M545 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.120763 0.00603078 0.01322173 54 0.132268 0.00783347 0.01315685 90 0.148363 0.00717395 0.01570916 126 0.194831 0.0088304 0.01797797 162 0.241864 0.0113171 0.02176955 198 0.261186 0.0274872 0.02646878 234 0.191217 0.00853133 0.01728928 270 0.142425 0.00709241 0.01357182 306 0.121424 0.00614388 0.01318627 342 0.1225 0.00571617 0.01272759