CLAS physics database search results Measurement E159M328 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 2.30805 0.376522 27 3.44474 0.488914 45 3.17137 0.455461 63 3.01708 0.395761 81 3.37399 0.432663 99 3.20052 0.407064 117 3.53024 0.452463 135 2.65882 0.604014 153 2.16571 1.23289 171 2.61005 1.53585