CLAS physics database search results Measurement E216M537 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.163733 0.0153205 0.02475443 54 0.169163 0.0258935 0.02501957 90 0.151326 0.027542 0.02440712 126 0.136266 0.00728385 0.01043484 162 0.134336 0.00725017 0.01056069 198 0.135642 0.00769196 0.01277825 234 0.134397 0.00763357 0.01103769 270 0.145174 0.0217517 0.01437344 306 0.158832 0.0135896 0.01928772 342 0.146578 0.0166265 0.02288119