CLAS physics database search results Measurement E159M175 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Data errors deg mcb/rad mcb/rad 9 3.67982 0.715619 27 4.33453 0.736905 45 3.69275 0.641668 63 3.95441 0.606258 81 3.48546 0.524452 99 3.81682 0.564104 117 4.03467 0.603468 135 3.75474 0.989247 153 1.75937 1.08738 171 1.79777 1.28058