CLAS physics database search results Measurement E159M560 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Stat. error deg mcb/rad mcb/rad 30 0.707135 0.124408 90 0.578439 0.0860958 150 0.701418 0.115932 210 0.834728 0.135458 270 0.74654 0.121299 330 0.66002 0.100848