CLAS physics database search results Measurement E216M853 CLAS12 Run Group A Krishna Chandra 2018 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.319204 0.0409596 0.05737214 27 0.372763 0.0418643 0.04096304 45 0.329183 0.0366842 0.03660554 63 0.371866 0.0248882 0.03842438 81 0.336945 0.018908 0.02641707 99 0.253454 0.014416 0.02481513 117 0.213203 0.0306037 0.02358354 135 0.223739 0.0146345 0.02371188 153 0.221554 0.0147834 0.02218405 171 0.22482 0.0270507 0.03257126