CLAS physics database search results Measurement E216M899 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 0.124191 0.0592576 0.03116938 27 0.173285 0.034867 0.02130426 45 0.098444 0.0177974 0.01035425 63 0.135455 0.0174963 0.01457443 81 0.129997 0.0183018 0.01327193 99 0.0961555 0.01714 0.01192112 117 0.0508088 0.0135702 0.0060418 135 0.0601307 0.00819998 0.02550261 153 0.0655495 0.00025283 0.03897489 171 0.0958099 8.336e-05 0.05506926