CLAS physics database search results Measurement E159M381 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.76885 0.520325 27 2.62417 0.397964 45 2.74678 0.401832 63 3.00083 0.430353 81 2.83889 0.408651 99 2.56855 0.379038 117 2.02024 0.28825 135 2.45752 0.385286 153 2.43784 0.371018 171 2.38355 0.40463