CLAS physics database search results Measurement E216M814 CLAS12 Run Group A Krishna Chandra 2018 psi(pi-) dsigma/dpsi_pim Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 18 0.0998695 0.010518 0.0147261 54 0.109543 0.00879513 0.01314139 90 0.117651 0.00812384 0.0099255 126 0.12432 0.00993052 0.01194382 162 0.104437 0.00795747 0.00832716 198 0.10401 0.013843 0.00946732 234 0.123494 0.00760528 0.00973719 270 0.0986437 0.00808448 0.00863752 306 0.118853 0.0148025 0.01348873 342 0.0855428 0.0124653 0.01357979