CLAS physics database search results Measurement E159M256 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 0.946422 0.221535 27 1.33318 0.230957 45 1.58827 0.234391 63 1.84261 0.259908 81 1.75155 0.221212 99 1.84899 0.242895 117 1.60043 0.233328 135 1.1281 0.338213 153 1.17222 0.660372 171 1.12777 0.781648