CLAS physics database search results Measurement E159M190 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 1.00984 0.156023 90 1.05566 0.161161 150 1.26974 0.18711 210 1.28492 0.192286 270 1.01482 0.154762 330 1.01102 0.157479