CLAS physics database search results Measurement E216M833 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0924137 0.00662414 0.00849469 54 0.0798844 0.00508145 0.00761845 90 0.093271 0.00816978 0.00827068 126 0.108047 0.00725175 0.00942193 162 0.113356 0.0101814 0.00998041 198 0.140215 0.0102466 0.01345172 234 0.118285 0.00789132 0.01257489 270 0.0833742 0.00577998 0.00775779 306 0.0999931 0.0130551 0.01171767 342 0.0703903 0.00472238 0.00780445