CLAS physics database search results Measurement E159M264 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.71703 0.30817 27 2.74116 0.394015 45 2.06458 0.278381 63 1.98489 0.266899 81 1.77091 0.2586 99 1.59279 0.246461 117 1.38771 0.196492 135 1.6389 0.218599 153 1.8038 0.258423 171 1.76501 0.327671