CLAS physics database search results Measurement E159M480 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.96299 0.418703 27 1.57671 0.293659 45 1.34359 0.193869 63 1.36776 0.209159 81 0.993854 0.159922 99 1.13164 0.203067 117 0.995715 0.156784 135 1.09302 0.177903 153 1.06662 0.197347 171 0.920018 0.222965