CLAS physics database search results Measurement E216M170 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 1.69812 0.0862521 0.13771704 27 1.73639 0.0528267 0.13821212 45 1.62057 0.033832 0.12417752 63 1.47169 0.028973 0.11076877 81 1.55851 0.0331593 0.11144895 99 1.54813 0.0382521 0.12474748 117 1.50955 0.0465526 0.20054265 135 1.34418 0.0673569 0.22485478 153 0.885248 0.0422927 0.38296682 171 1.3215 0.0116552 0.7156236