CLAS physics database search results Measurement E159M670 E1-6 V. Burkert 2001 theta(pi+) dsigma/d(−cos(theta_pip)) Stat. error deg mcb/rad mcb/rad 9 0.0618869 0.0480492 27 0.208804 0.0545647 45 0.34706 0.0947869 63 0.454325 0.0794449 81 0.438923 0.0796816 99 0.408474 0.06838 117 0.352204 0.0661928 135 0.374016 0.170449 153 0.352302 0.261917 171 0.313227 0.356915