CLAS physics database search results Measurement E216M410 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.130655 0.00775256 0.01828928 54 0.137085 0.0117885 0.02027991 90 0.19129 0.00930078 0.02175336 126 0.237727 0.0102985 0.02634083 162 0.294324 0.00986074 0.033212 198 0.288996 0.00998601 0.03355586 234 0.238552 0.0123853 0.02665652 270 0.162682 0.00630274 0.02178045 306 0.139619 0.00634082 0.01771272 342 0.150451 0.00717962 0.01980161