CLAS physics database search results Measurement E159M733 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 0.445247 0.138796 27 0.79092 0.180329 45 0.725941 0.137432 63 0.848722 0.147797 81 0.843391 0.125992 99 0.777824 0.126031 117 1.01042 0.163039 135 0.73372 0.214324 153 0.570898 0.446213 171 0.513736 0.468312