CLAS physics database search results Measurement E216M761 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0281391 0.00476609 0.00378687 54 0.0236193 0.00391083 0.00310156 90 0.0376286 0.00850457 0.00580937 126 0.032414 0.00504891 0.00478378 162 0.0466912 0.00741211 0.01456688 198 0.0458918 0.0123196 0.01064339 234 0.0330271 0.00582903 0.0040103 270 0.0310065 0.00484801 0.00390073 306 0.0277128 0.00477991 0.00469444 342 0.0255428 0.00422479 0.00512794