CLAS physics database search results Measurement E216M791 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 0.226136 0.0408712 0.02227041 27 0.169785 0.0203219 0.01499199 45 0.172838 0.0152655 0.01348249 63 0.163225 0.0134402 0.01309337 81 0.186643 0.015242 0.01447354 99 0.158094 0.0190896 0.0163181 117 0.19127 0.0270848 0.01791401 135 0.145619 0.0180021 0.03101326 153 0.105124 0.0123041 0.05830432 171 0.150622 0.00013553 0.09509325