CLAS physics database search results Measurement E159M338 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 2.91322 0.556039 27 2.63946 0.41223 45 2.48123 0.371645 63 2.93869 0.418706 81 3.74707 0.541243 99 4.25293 0.573427 117 4.42243 0.623803 135 3.94814 0.646731 153 3.29499 0.514362 171 3.07802 0.689077