CLAS physics database search results Measurement E159M336 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.38532 0.55458 27 4.37518 0.622011 45 4.02381 0.54558 63 3.54686 0.452267 81 3.54594 0.457094 99 3.27515 0.42657 117 3.05998 0.407106 135 3.22659 0.417553 153 3.29773 0.443564 171 3.89242 0.661071