CLAS physics database search results Measurement E216M296 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 1.09031 0.0828718 0.09779257 27 1.10963 0.045297 0.0878242 45 1.10512 0.0308779 0.0876859 63 1.02769 0.0278886 0.0779372 81 1.13988 0.0312175 0.08336767 99 1.03836 0.0379275 0.07823889 117 1.13419 0.0509204 0.12340846 135 1.25179 0.278432 0.2473084 153 0.740028 0.0337774 0.31260505 171 1.00009 0.00860872 0.54300288