CLAS physics database search results Measurement E159M840 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error deg mcb/rad mcb/rad 9 0.762954 0.212523 27 1.05839 0.190605 45 1.37164 0.258325 63 1.32495 0.226838 81 1.43267 0.239843 99 1.27557 0.210079 117 0.987298 0.175799 135 0.910002 0.174797 153 0.699123 0.156353 171 0.821669 0.231647