CLAS physics database search results Measurement E159M93 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.84878 0.549814 27 3.26201 0.534301 45 3.38299 0.532475 63 2.89806 0.443631 81 2.46433 0.383225 99 2.04257 0.326523 117 2.38536 0.381918 135 2.2308 0.359826 153 1.76342 0.295808 171 1.46253 0.318821