CLAS physics database search results Measurement E216M212 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.641234 0.0120625 0.07487699 54 0.566829 0.0125711 0.06118909 90 0.646836 0.0149735 0.05945384 126 0.826709 0.0187429 0.06947547 162 1.00874 0.0505604 0.08189048 198 0.984271 0.0251754 0.07524464 234 0.791066 0.018526 0.06772845 270 0.617901 0.0146296 0.05803602 306 0.565768 0.0159234 0.06232883 342 0.627067 0.0144844 0.07508435