CLAS physics database search results Measurement E216M827 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 0.296089 0.042723 0.02709564 27 0.303107 0.0214112 0.0250246 45 0.316541 0.0168692 0.02797027 63 0.352499 0.0166269 0.02833515 81 0.365738 0.0185117 0.02970715 99 0.325865 0.0213231 0.02858776 117 0.333726 0.0281322 0.02738188 135 0.301797 0.045668 0.05176734 153 0.221115 0.0178814 0.08062286 171 0.246299 0.00023111 0.12752536