CLAS physics database search results Measurement E159M184 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 4.66686 0.867371 27 4.60658 0.743174 45 3.02886 0.504453 63 3.74222 0.573152 81 3.65393 0.544032 99 3.94303 0.572197 117 4.04599 0.594452 135 3.71951 0.989247 153 2.06061 1.2744 171 1.86481 1.32214