CLAS physics database search results Measurement E159M984 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.759772 0.230325 27 1.0103 0.206097 45 0.967893 0.175606 63 1.02437 0.161085 81 0.92088 0.143552 99 0.891761 0.165331 117 0.819957 0.152157 135 0.824467 0.166597 153 0.874025 0.173377 171 0.423795 0.150195