CLAS physics database search results Measurement E159M131 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 3.83436 0.929556 27 3.81438 0.668001 45 2.80101 0.467176 63 3.33717 0.58486 81 4.01146 0.688357 99 6.16824 1.01917 117 5.24412 0.892073 135 4.55554 0.805332 153 3.66099 0.714895 171 3.57494 0.857384