CLAS physics database search results Measurement E159M1084 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error deg mcb/rad mcb/rad 9 0.853766 0.242894 27 0.840769 0.256906 45 0.793187 0.185281 63 0.82677 0.204391 81 0.860745 0.167102 99 0.649801 0.125874 117 0.758587 0.178332 135 0.684001 0.210998 153 0.724518 0.532769 171 0.696633 0.579096