CLAS physics database search results Measurement E159M311 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 0.834067 0.244736 27 0.960089 0.184126 45 1.06394 0.18712 63 1.48781 0.228771 81 1.85759 0.294881 99 2.31353 0.391253 117 2.34815 0.354743 135 2.17377 0.346561 153 2.28217 0.405069 171 2.05954 0.454916