CLAS physics database search results Measurement E216M572 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.22319 0.00828281 0.02057501 54 0.21931 0.00749871 0.02049234 90 0.235978 0.00982318 0.02184142 126 0.280232 0.0126416 0.02419956 162 0.305766 0.0103972 0.03070985 198 0.287208 0.0109645 0.02580701 234 0.293335 0.00986554 0.02459943 270 0.241831 0.00863671 0.022144 306 0.21083 0.00982982 0.02001018 342 0.16972 0.0466116 0.02007326