CLAS physics database search results Measurement E216M845 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 0.375939 0.0410157 0.03299566 27 0.363057 0.0250056 0.0295955 45 0.348109 0.0191032 0.02812559 63 0.364358 0.0165357 0.03158802 81 0.326912 0.0204117 0.0251742 99 0.348967 0.0236187 0.02699187 117 0.294632 0.0181338 0.02567862 135 0.25768 0.0329492 0.0321187 153 0.165 0.043175 0.0427755 171 0.147043 0.00014178 0.07966051