CLAS physics database search results Measurement E216M752 CLAS12 Run Group A Krishna Chandra 2018 psi(pi+) dsigma/dpsi_pip Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.100998 0.00538246 0.00940272 54 0.0992514 0.00477118 0.00888921 90 0.122688 0.00603348 0.00954047 126 0.170073 0.00828574 0.01269583 162 0.219003 0.00971222 0.01615256 198 0.203806 0.00807726 0.01499832 234 0.146683 0.0084732 0.01194993 270 0.123144 0.00793044 0.01014116 306 0.0981157 0.00532943 0.00890885 342 0.104768 0.00496215 0.01131134