CLAS physics database search results Measurement E216M962 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 0.278752 0.048895 0.03157373 27 0.245741 0.0247554 0.02120041 45 0.277822 0.0209748 0.02350552 63 0.243925 0.0176736 0.02062726 81 0.254282 0.0179856 0.02148252 99 0.254045 0.0270008 0.02196089 117 0.21183 0.025691 0.02205283 135 0.165787 0.0211931 0.02758728 153 0.124527 0.0137558 0.04539461 171 0.133735 0.00012536 0.072552