CLAS physics database search results Measurement E216M305 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 1.58402 0.0909494 0.12738087 27 1.5271 0.0496335 0.11912058 45 1.45532 0.0362227 0.11647866 63 1.46283 0.0362317 0.10966906 81 1.52474 0.0362036 0.1153562 99 1.53941 0.0365466 0.11795052 117 1.57026 0.0473543 0.18532002 135 1.26349 0.061672 0.42756036 153 0.98586 0.0400122 0.4015855 171 1.31041 0.0116025 0.72818687