CLAS physics database search results Measurement E216M526 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.127898 0.013051 0.02179085 54 0.149868 0.0143274 0.01802279 90 0.120302 0.0119597 0.01084994 126 0.155976 0.00898611 0.01281287 162 0.168461 0.00923176 0.01538807 198 0.187693 0.00985783 0.01681299 234 0.14978 0.00826024 0.01339433 270 0.168055 0.0200198 0.02090152 306 0.159832 0.021451 0.01617824 342 0.129612 0.0158775 0.01952156