CLAS physics database search results Measurement E216M518 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.107627 0.00698969 0.01232608 54 0.110893 0.00758937 0.01267602 90 0.106791 0.00697157 0.01415874 126 0.139463 0.00866759 0.01618907 162 0.167596 0.0226811 0.02015519 198 0.169982 0.00999944 0.02073159 234 0.162867 0.0109301 0.01837191 270 0.125912 0.0107388 0.01501586 306 0.111712 0.00772034 0.01315541 342 0.102572 0.00830332 0.01315258