CLAS physics database search results Measurement E159M12 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.09846 0.345942 27 0.822396 0.191066 45 0.930929 0.187625 63 0.984512 0.183324 81 0.668407 0.136293 99 0.674309 0.126824 117 0.759349 0.146756 135 0.664334 0.139297 153 0.990548 0.216646 171 0.967889 0.320538