CLAS physics database search results Measurement E159M156 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.5623 0.482237 27 3.25049 0.524567 45 3.49116 0.543728 63 3.80452 0.580131 81 3.47974 0.522914 99 3.01134 0.4688 117 2.6139 0.404888 135 2.62109 0.414509 153 2.5434 0.415408 171 2.1826 0.419648