CLAS physics database search results Measurement E216M805 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0670525 0.00784881 0.01193966 54 0.0544855 0.0166488 0.00701066 90 0.0962614 0.00844045 0.00753441 126 0.0994843 0.00942711 0.00877297 162 0.0935838 0.0067028 0.00813527 198 0.0951271 0.00678485 0.00736463 234 0.0991738 0.00673306 0.00758518 270 0.090866 0.0101387 0.00798313 306 0.091013 0.0118281 0.01224627 342 0.0691085 0.00802799 0.01306042