CLAS physics database search results Measurement E159M509 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 0.399174 0.136158 27 0.463589 0.133732 45 0.498922 0.107904 63 0.681881 0.144727 81 1.20375 0.269384 99 1.10764 0.201606 117 1.28855 0.254312 135 1.43017 0.352058 153 1.38853 0.379035 171 0.948937 0.261697