CLAS physics database search results Measurement E216M275 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.247502 0.010975 0.0292334 54 0.224609 0.00914388 0.02843478 90 0.224733 0.0092057 0.02975894 126 0.337896 0.0135236 0.03839386 162 0.387859 0.0162343 0.04490451 198 0.397183 0.0151185 0.04469748 234 0.317485 0.012973 0.03725944 270 0.241864 0.0108783 0.03141142 306 0.200841 0.00845665 0.02739006 342 0.276117 0.0140258 0.03204507