CLAS physics database search results Measurement E216M555 CLAS12 Run Group A Krishna Chandra 2018 psi(p) dsigma/dpsi_pr Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.237869 0.0133006 0.03233138 54 0.248622 0.0177672 0.02133367 90 0.241728 0.0163461 0.02043773 126 0.204125 0.0113367 0.01786551 162 0.229857 0.00941641 0.01839785 198 0.224556 0.0120492 0.01850674 234 0.219831 0.00974404 0.01593866 270 0.22611 0.0120056 0.01717566 306 0.218398 0.0131941 0.02078125 342 0.217726 0.0135714 0.03160523