CLAS physics database search results Measurement E216M176 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.549811 0.016016 0.07187597 54 0.577051 0.0336957 0.07252767 90 0.613278 0.0174064 0.06670997 126 0.766118 0.0225668 0.0744275 162 0.874078 0.0171699 0.08441117 198 0.852047 0.0164268 0.08182197 234 0.721415 0.0142035 0.07013689 270 0.590506 0.0132324 0.06408354 306 0.549192 0.0180963 0.06514888 342 0.553483 0.0246272 0.06858746