CLAS physics database search results Measurement E216M733 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.137302 0.0197592 0.01828862 54 0.124158 0.00640968 0.010339 90 0.144937 0.0068248 0.01089979 126 0.154737 0.0234841 0.01312948 162 0.189174 0.0147447 0.01570791 198 0.195415 0.00865228 0.01425454 234 0.169827 0.00872412 0.01407302 270 0.149483 0.00771966 0.01111466 306 0.143377 0.0111605 0.01314926 342 0.136894 0.0179671 0.01737052