CLAS physics database search results Measurement E159M23 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 0.374433 0.177878 27 1.01323 0.226051 45 0.557179 0.150865 63 1.22055 0.25874 81 1.47371 0.291956 99 1.16553 0.23718 117 1.29792 0.26022 135 1.43752 0.294502 153 1.39617 0.313514 171 1.5532 0.411671