CLAS physics database search results Measurement E159M1075 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 0.526046 0.19311 27 0.539078 0.133472 45 0.667696 0.180313 63 0.860426 0.207875 81 0.863107 0.201637 99 0.806672 0.156639 117 0.817937 0.18203 135 0.691412 0.197687 153 0.633361 0.545959 171 0.651055 0.54206