CLAS physics database search results Measurement E159M372 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.56185 0.460238 27 2.3946 0.353734 45 3.13004 0.464055 63 2.97501 0.41316 81 3.06145 0.429663 99 2.56118 0.362669 117 2.29507 0.339932 135 2.4237 0.369067 153 2.4897 0.378922 171 2.18894 0.400797