CLAS physics database search results Measurement E159M307 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.430589 0.059936 90 0.478335 0.0680385 150 0.719372 0.0962635 210 0.800219 0.107419 270 0.534014 0.0745483 330 0.478052 0.0652903