CLAS physics database search results Measurement E159M542 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Stat. error deg mcb/rad mcb/rad 30 0.779467 0.140206 90 0.50188 0.0786459 150 0.621843 0.114626 210 0.650493 0.103617 270 0.558663 0.0914259 330 0.688059 0.133273