CLAS physics database search results Measurement E159M85 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 1.40643 0.486059 27 2.42886 0.428867 45 1.8648 0.315335 63 2.38378 0.382735 81 2.71637 0.410514 99 2.65175 0.413364 117 2.63824 0.430544 135 1.41156 0.989247 153 0.85207 0.592364 171 0.949203 0.873983