CLAS physics database search results Measurement E216M502 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 1.85737 0.0786318 0.23430822 27 1.67409 0.0577691 0.19483536 45 1.34672 0.0512357 0.10569416 63 1.11729 0.0446859 0.08276135 81 0.983927 0.0277779 0.07222098 99 0.914105 0.0360579 0.07163196 117 0.773676 0.0220243 0.05887666 135 0.715187 0.0225573 0.05855592 153 0.749966 0.0283561 0.07888571 171 1.10371 0.0551864 0.16780613