CLAS physics database search results Measurement E159M103 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 3.00429 0.583416 27 3.78304 0.600694 45 3.09535 0.518455 63 3.4887 0.512599 81 3.51778 0.507762 99 2.91149 0.427282 117 3.07921 0.439157 135 1.96971 0.989247 153 1.16402 0.742467 171 1.30105 1.04081