CLAS physics database search results Measurement E159M273 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.76326 0.29529 27 2.21986 0.329827 45 2.15549 0.299878 63 1.62284 0.215778 81 1.3219 0.173505 99 1.23488 0.178726 117 1.25856 0.175515 135 1.35941 0.193516 153 1.49037 0.222855 171 1.10923 0.225933