CLAS physics database search results Measurement E159M597 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Stat. error deg mcb/rad mcb/rad 9 1.18445 0.26521 27 1.40528 0.265732 45 1.48013 0.227567 63 1.72478 0.263611 81 1.76716 0.267381 99 1.6687 0.271003 117 1.36401 0.218041 135 1.33617 0.230036 153 1.52511 0.26709 171 1.17295 0.263169