CLAS physics database search results Measurement E159M651 E1-6 V. Burkert 2001 theta(pi-) dsigma/d(−cos(theta_pim)) Data errors deg mcb/rad mcb/rad 9 1.6456 0.318266 27 1.34196 0.218093 45 1.5723 0.240825 63 1.54728 0.243985 81 1.60138 0.256999 99 1.5487 0.25075 117 1.28017 0.210673 135 1.41306 0.240409 153 1.26023 0.237444 171 1.03892 0.275938