CLAS physics database search results Measurement E159M282 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.44015 0.435634 27 2.95608 0.415893 45 2.04259 0.273218 63 1.67072 0.224011 81 1.34939 0.18589 99 1.21825 0.179076 117 1.22742 0.183096 135 1.26637 0.17936 153 1.19946 0.176991 171 1.16399 0.250473