CLAS physics database search results Measurement E216M531 CLAS12 Run Group A Krishna Chandra 2018 theta(p) dsigma/d(−cos(theta_pr)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 0.257289 0.033462 0.06613379 27 0.402944 0.069818 0.06665171 45 0.425484 0.0526563 0.08582759 63 0.400232 0.0460175 0.05247641 81 0.528365 0.08945 0.05248946 99 0.460004 0.0289128 0.03956122 117 0.401724 0.142319 0.06608898 135 0.559576 0.0344644 0.06421926 153 0.617571 0.0419002 0.05820608 171 0.535286 0.0652152 0.05959303