CLAS physics database search results Measurement E159M534 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 2.05584 0.47269 27 2.70357 0.474493 45 1.83477 0.305839 63 1.9296 0.300202 81 1.45076 0.220641 99 1.38494 0.242703 117 1.33042 0.209593 135 1.31616 0.19347 153 1.33461 0.238665 171 0.920397 0.239668