CLAS physics database search results Measurement E159M1021 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error deg mcb/rad mcb/rad 9 0.524117 0.176713 27 0.715298 0.18428 45 1.18298 0.319827 63 1.10689 0.264586 81 0.910574 0.188269 99 0.90718 0.197317 117 0.821533 0.162927 135 0.789406 0.190664 153 0.490484 0.345818 171 0.650043 0.523074