CLAS physics database search results Measurement E216M404 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 0.660768 0.0592484 0.06260848 27 0.689552 0.0404065 0.05344577 45 0.691549 0.0316098 0.06269368 63 0.651491 0.0241824 0.04927682 81 0.703326 0.031411 0.0518824 99 0.584633 0.0437157 0.05888268 117 0.617879 0.0327622 0.08991619 135 0.605933 0.0232348 0.15563694 153 0.598253 0.0164483 0.32215899 171 0.93739 0.00137793 0.50926367