CLAS physics database search results Measurement E159M563 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 2.47834 0.595746 27 2.65763 0.574881 45 1.93976 0.363802 63 1.8078 0.303306 81 2.52389 0.451678 99 2.2753 0.328685 117 2.47006 0.367114 135 2.41587 0.497696 153 1.49048 0.284588 171 1.59733 0.375853