CLAS physics database search results Measurement E216M926 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 0.0960482 0.0335682 0.02370404 27 0.166756 0.023782 0.01526855 45 0.169411 0.0187661 0.01949566 63 0.134147 0.014232 0.01224679 81 0.129407 0.0193766 0.01273264 99 0.100574 0.0311411 0.01103141 117 0.143502 0.042601 0.02964838 135 0.0835795 0.0141591 0.01887253 153 0.0903611 0.0355513 0.03818508 171 0.0932879 8.401e-05 0.05636945