CLAS physics database search results Measurement E216M457 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 1.35063 0.0947913 0.16486081 27 1.23106 0.040759 0.13020256 45 1.28113 0.0521714 0.11692072 63 1.3144 0.0360666 0.11310985 81 1.23556 0.034961 0.10630981 99 1.14765 0.0305082 0.10386081 117 1.00327 0.0587565 0.10425248 135 0.833348 0.032318 0.08727443 153 0.937227 0.0336176 0.1068796 171 1.23898 0.0730999 0.18874256