CLAS physics database search results Measurement E216M662 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0546937 0.00379841 0.0064828 54 0.0668759 0.00470818 0.00681745 90 0.0929434 0.0234424 0.02458771 126 0.0885425 0.00599016 0.00964744 162 0.103327 0.00668613 0.01159698 198 0.110376 0.00859661 0.010948 234 0.0883 0.00928839 0.00960863 270 0.0743647 0.00535334 0.008056 306 0.0629676 0.0064647 0.00733719 342 0.0610593 0.00450843 0.00629066