CLAS physics database search results Measurement E216M134 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 1.07325 0.138546 0.1519869 27 0.910966 0.0622487 0.07272055 45 0.786384 0.0398208 0.0651166 63 0.82644 0.0357246 0.06494899 81 0.785603 0.0372632 0.06762865 99 0.771542 0.0417582 0.09516935 117 0.722733 0.0223356 0.17308508 135 0.588965 0.0344812 0.21310981 153 0.733779 0.00628119 0.38769908 171 0.948424 0.00292572 0.51203188