CLAS physics database search results Measurement E216M868 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0776724 0.0159904 0.01568912 54 0.056546 0.0100835 0.0066098 90 0.0800665 0.00889362 0.00829308 126 0.106073 0.00703238 0.00873509 162 0.127204 0.00660577 0.009821 198 0.132779 0.00666951 0.00973187 234 0.0997286 0.00586169 0.00773584 270 0.0844818 0.00603607 0.0074028 306 0.0696276 0.00587604 0.00858048 342 0.0873842 0.0106294 0.01095851