CLAS physics database search results Measurement E216M871 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 0.489497 0.0501284 0.05963037 27 0.36606 0.0474311 0.03884488 45 0.44431 0.0502558 0.04551296 63 0.326091 0.0181832 0.02529706 81 0.300669 0.021992 0.02645118 99 0.255421 0.0192355 0.02436222 117 0.20848 0.0124944 0.02191203 135 0.20488 0.0165168 0.02097396 153 0.212772 0.0160058 0.0257604 171 0.216168 0.0224728 0.03033799