CLAS physics database search results Measurement E159M849 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.33555 0.302824 27 1.05178 0.179196 45 0.980575 0.165675 63 1.24049 0.208376 81 1.25045 0.205367 99 1.07631 0.176078 117 0.92696 0.163445 135 0.6908 0.155229 153 0.930505 0.186121 171 0.441982 0.165874