CLAS physics database search results Measurement E216M339 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.54543 0.0500598 0.06857064 54 0.506643 0.0157328 0.04750344 90 0.510746 0.0143324 0.04028521 126 0.495071 0.0148321 0.04076902 162 0.538474 0.0161663 0.0499105 198 0.535007 0.0163573 0.04311283 234 0.479129 0.0128683 0.04792973 270 0.503241 0.0147676 0.03875024 306 0.502324 0.0165688 0.05807992 342 0.434979 0.0262102 0.05769726