CLAS physics database search results Measurement E216M728 CLAS12 Run Group A Krishna Chandra 2018 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.490102 0.114511 0.05370887 27 0.561287 0.027402 0.04487201 45 0.53907 0.016822 0.04135002 63 0.520613 0.0172327 0.03960393 81 0.512867 0.0235881 0.04063846 99 0.556354 0.0277393 0.04216091 117 0.491186 0.0367067 0.04162283 135 0.379826 0.0196599 0.03837597 153 0.245298 0.0194824 0.04903333 171 0.258148 0.00035266 0.13349557