CLAS physics database search results Measurement E216M530 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 0.620832 0.0737255 0.05851032 27 0.609125 0.0365186 0.05141671 45 0.517397 0.0277214 0.05483464 63 0.447571 0.0213671 0.03847189 81 0.426066 0.0210761 0.03661008 99 0.423067 0.0284751 0.03395424 117 0.34912 0.0639248 0.03651497 135 0.389413 0.022464 0.08267215 153 0.341917 0.0132896 0.1709777 171 0.520852 0.0005225 0.26938889