CLAS physics database search results Measurement E216M688 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.157356 0.0140658 0.02487495 54 0.177979 0.0128002 0.02173597 90 0.167751 0.00814021 0.01284135 126 0.178218 0.00798172 0.01411449 162 0.187234 0.00867272 0.01493124 198 0.184704 0.0108164 0.01494416 234 0.192532 0.0093127 0.01489738 270 0.175772 0.00829449 0.01400866 306 0.146214 0.00848144 0.01649375 342 0.184136 0.0197485 0.02569309