CLAS physics database search results Measurement E216M674 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 0.431951 0.0459874 0.03878071 27 0.337155 0.0215194 0.02682428 45 0.34123 0.0179189 0.02708239 63 0.325641 0.0155679 0.02573336 81 0.299213 0.0322825 0.02565088 99 0.321832 0.0216078 0.02458565 117 0.309451 0.0280382 0.02888539 135 0.293175 0.023044 0.05332952 153 0.208253 0.0212595 0.0860516 171 0.297642 0.00026854 0.15624183