CLAS physics database search results Measurement E216M445 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.36719 0.0223111 0.06420675 54 0.354655 0.012076 0.03740137 90 0.362481 0.0104554 0.02932232 126 0.36862 0.00951296 0.02737014 162 0.35924 0.0100553 0.02713737 198 0.405232 0.010268 0.0311295 234 0.370265 0.00923325 0.02781172 270 0.363667 0.00958327 0.02871919 306 0.351859 0.0162177 0.03711587 342 0.393922 0.027825 0.06325521