CLAS physics database search results Measurement E216M368 CLAS12 Run Group A Krishna Chandra 2018 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error Syst. error deg mcbn/rad mcbn/rad mcbn/rad 9 2.20212 0.075575 0.18990073 27 1.92464 0.0446275 0.16363091 45 1.58622 0.0407609 0.1247568 63 1.44987 0.0334771 0.11101669 81 1.48635 0.0481855 0.10682498 99 1.47303 0.0472495 0.10613893 117 1.35573 0.0342707 0.09893748 135 1.14766 0.0435852 0.10527269 153 1.20961 0.0645956 0.16053178 171 0.924475 0.0105698 0.54435287