CLAS physics database search results Measurement E216M476 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 1.43082 0.05468 0.13140889 27 1.37704 0.0327746 0.11120664 45 1.21273 0.0272578 0.09741335 63 1.23103 0.027549 0.09505203 81 1.28913 0.032939 0.09706172 99 1.35271 0.0371487 0.0969281 117 1.15389 0.0281754 0.09164496 135 0.987262 0.0381148 0.10513856 153 0.821564 0.0429735 0.14492189 171 0.770229 0.00203763 0.43298276