CLAS physics database search results Measurement E159M437 E1-6 V. Burkert 2001 theta(p) dsigma/d(−cos(theta_pr)) Data errors deg mcb/rad mcb/rad 9 2.51364 0.600713 27 1.93585 0.378295 45 1.3863 0.252274 63 1.06477 0.205518 81 1.72348 0.300861 99 2.13979 0.337503 117 2.51185 0.397903 135 2.57656 0.398743 153 3.35645 0.529143 171 4.12237 0.771233