CLAS physics database search results Measurement E216M509 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0947907 0.00840394 0.01132917 54 0.0754792 0.00639154 0.01066419 90 0.090763 0.00842544 0.01168309 126 0.0984181 0.00775017 0.01438245 162 0.116152 0.0091691 0.02068012 198 0.121961 0.0133489 0.01574836 234 0.105048 0.00908956 0.01394627 270 0.0805846 0.00743144 0.01208178 306 0.0649426 0.0117839 0.01003799 342 0.0871195 0.00803738 0.01161785