CLAS physics database search results Measurement E216M819 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 0.305173 0.057821 0.05682097 27 0.222713 0.0219942 0.03126144 45 0.250274 0.0369922 0.028893 63 0.288315 0.0164713 0.03320525 81 0.358641 0.0237506 0.03656564 99 0.455364 0.0310713 0.03659318 117 0.399541 0.0236489 0.03338139 135 0.395738 0.0244059 0.03206751 153 0.288227 0.0532544 0.03780997 171 0.264274 0.0451108 0.0339018