CLAS physics database search results Measurement E216M440 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 1.38111 0.0670337 0.10965853 27 1.33624 0.040158 0.09996589 45 1.31634 0.0327263 0.10323125 63 1.32329 0.0314771 0.10254666 81 1.38031 0.0383449 0.10156679 99 1.51185 0.0355674 0.11121848 117 1.26618 0.0371478 0.13734107 135 1.21049 0.0472519 0.25401589 153 1.0951 0.0392688 0.4777858 171 1.38064 0.00414975 0.82809491