CLAS physics database search results Measurement E216M977 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0619122 0.00614845 0.00839877 54 0.0437098 0.00799236 0.00498651 90 0.0687465 0.00772769 0.00721434 126 0.103993 0.0109234 0.00993003 162 0.136687 0.0138062 0.01250966 198 0.107144 0.0150362 0.0103899 234 0.0819601 0.00826342 0.01666629 270 0.0703837 0.00858172 0.00715124 306 0.0756641 0.0122365 0.00870172 342 0.0640786 0.00558216 0.00698114