CLAS physics database search results Measurement E216M386 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 0.55607 0.111817 0.11028039 27 0.507364 0.0439376 0.05884373 45 0.508227 0.0323538 0.04535898 63 0.410554 0.0309735 0.03808384 81 0.368169 0.025313 0.03273317 99 0.443719 0.0500101 0.0634009 117 0.388645 0.0234366 0.09142518 135 0.337956 0.0219296 0.11566007 153 0.453615 0.0022472 0.25395393 171 0.546492 0.00054127 0.30226475