CLAS physics database search results Measurement E159M426 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 3.83355 0.71828 27 3.11682 0.457788 45 2.66882 0.409744 63 2.47007 0.361325 81 2.38618 0.357572 99 2.31022 0.353355 117 2.05222 0.299421 135 2.34225 0.356691 153 2.68414 0.415396 171 2.53618 0.472928