CLAS physics database search results Measurement E159M1011 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 0.423943 0.142625 27 0.657799 0.152618 45 0.864001 0.160475 63 0.822467 0.136416 81 0.959994 0.173627 99 0.766603 0.144675 117 0.668826 0.123552 135 0.565616 0.121774 153 0.677794 0.176822 171 0.553508 0.193453