CLAS physics database search results Measurement E216M706 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.148415 0.0143879 0.02065357 54 0.141195 0.00719247 0.01355794 90 0.138081 0.00919346 0.0121409 126 0.149646 0.00897676 0.01211764 162 0.162129 0.0070115 0.01211076 198 0.158471 0.00717359 0.01244555 234 0.171826 0.00753321 0.01442651 270 0.162582 0.00887033 0.01281693 306 0.14699 0.011144 0.01409104 342 0.1183 0.0192585 0.01650034