CLAS physics database search results Measurement E159M750 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.14014 0.268089 27 1.42963 0.262761 45 1.39015 0.245413 63 1.26267 0.19423 81 1.0837 0.17852 99 0.972624 0.158331 117 0.826892 0.145145 135 0.759845 0.129156 153 0.885514 0.152538 171 0.541621 0.15053