CLAS physics database search results Measurement E216M826 CLAS12 Run Group A Krishna Chandra 2018 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.313093 0.0451528 0.05075682 27 0.376113 0.0540072 0.04207339 45 0.343135 0.022786 0.03159762 63 0.350432 0.0212937 0.03085401 81 0.343288 0.0205544 0.02997315 99 0.311494 0.0191026 0.02843823 117 0.262661 0.0151668 0.02478148 135 0.235956 0.0153423 0.0243604 153 0.2502 0.0188902 0.03025869 171 0.254871 0.0297077 0.02758503