CLAS physics database search results Measurement E159M401 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 2.61945 0.53734 27 2.34957 0.38545 45 1.75226 0.291177 63 1.70386 0.323034 81 2.37276 0.422193 99 2.89542 0.427567 117 2.95222 0.475831 135 2.88381 0.446182 153 3.43595 0.562609 171 4.2123 0.845129