CLAS physics database search results Measurement E159M508 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error deg mcb/rad mcb/rad 9 0.440027 0.167396 27 1.02174 0.166621 45 1.10071 0.177656 63 1.01068 0.156708 81 0.994117 0.151993 99 1.22435 0.196259 117 1.26854 0.184535 135 1.02219 0.227627 153 0.718329 0.629329 171 0.56237 0.498955