CLAS physics database search results Measurement E216M629 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 1.28911 0.0621754 0.11027439 27 0.999607 0.0372381 0.08080353 45 0.85884 0.0274723 0.06414234 63 0.686775 0.0205217 0.05236096 81 0.727463 0.026329 0.05532584 99 0.679772 0.0288649 0.05443837 117 0.584239 0.0456399 0.05197798 135 0.499432 0.0299885 0.04634412 153 0.417663 0.0247207 0.06674764 171 0.403524 0.00191463 0.21279342