CLAS physics database search results Measurement E216M968 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0532655 0.0067754 0.007516 54 0.0724403 0.00808851 0.00805792 90 0.0929114 0.0119306 0.0113392 126 0.084744 0.00747035 0.00794298 162 0.0951697 0.00952522 0.01009227 198 0.11584 0.0098325 0.01258421 234 0.0937593 0.00925231 0.00871946 270 0.0741845 0.00795929 0.00653155 306 0.0535848 0.00555329 0.00645769 342 0.0505947 0.00602048 0.00553763