CLAS physics database search results Measurement E159M255 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.62858 0.284355 27 2.20066 0.324255 45 1.6954 0.226613 63 1.44765 0.190389 81 1.48286 0.203711 99 1.33026 0.195571 117 1.41791 0.212475 135 1.37131 0.198198 153 1.51596 0.25026 171 1.41418 0.249782