CLAS physics database search results Measurement E159M346 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 3.82136 0.694553 27 3.65609 0.537947 45 3.54336 0.489099 63 3.68217 0.487677 81 3.86922 0.505367 99 3.95592 0.505628 117 4.13609 0.547462 135 3.265 0.606457 153 2.51673 1.46406 171 2.595 1.5486