CLAS physics database search results Measurement E216M474 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.380982 0.0195595 0.04176752 54 0.356691 0.0115109 0.0301228 90 0.353954 0.0126123 0.02838705 126 0.357411 0.00945861 0.02687277 162 0.378403 0.00877721 0.02860809 198 0.366889 0.00828118 0.0285599 234 0.350722 0.00961038 0.02599381 270 0.383688 0.0114327 0.0296563 306 0.362815 0.0224517 0.0302725 342 0.36376 0.0193747 0.04012324