CLAS physics database search results Measurement E216M692 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 0.576473 0.0503946 0.04806911 27 0.571063 0.0334777 0.04367477 45 0.547139 0.028873 0.04331466 63 0.563722 0.0225649 0.0459883 81 0.591935 0.0219873 0.04472826 99 0.635206 0.0283173 0.04875209 117 0.515027 0.0243077 0.07395725 135 0.480835 0.0475736 0.08311936 153 0.422701 0.0251795 0.15269583 171 0.470667 0.00055926 0.24736368