CLAS physics database search results Measurement E159M221 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 3.3295 0.723213 27 3.1383 0.552139 45 1.96549 0.411612 63 2.19487 0.441372 81 2.68308 0.452593 99 3.12673 0.540396 117 3.80007 0.622673 135 4.20642 0.736646 153 5.50746 0.957799 171 5.88553 1.21307