CLAS physics database search results Measurement E216M485 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 1.56686 0.0835181 0.14994028 27 1.41028 0.0370227 0.115622 45 1.16974 0.0280616 0.08956307 63 1.10556 0.0267904 0.08571856 81 1.1779 0.032814 0.08745649 99 1.20858 0.0281705 0.08561523 117 1.07215 0.024379 0.0805851 135 0.917175 0.0674601 0.1100311 153 0.873383 0.0428267 0.13830994 171 0.802028 0.00223373 0.42495436