CLAS physics database search results Measurement E216M872 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 0.431662 0.0433735 0.03638864 27 0.469021 0.025788 0.03569676 45 0.349942 0.016928 0.02693703 63 0.31342 0.0157517 0.02518008 81 0.283198 0.015718 0.02288532 99 0.263731 0.0270123 0.02458661 117 0.249855 0.0185651 0.02063741 135 0.211054 0.0242908 0.03014079 153 0.153872 0.0170878 0.03252193 171 0.166148 0.00017909 0.08740346