CLAS physics database search results Measurement E159M696 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.66257 0.169643 27 0.802329 0.131612 45 0.879589 0.152449 63 0.654227 0.108409 81 0.757068 0.132131 99 0.609857 0.103649 117 0.634785 0.108158 135 0.648794 0.119386 153 0.689851 0.147669 171 0.352066 0.107895