CLAS physics database search results Measurement E159M407 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.792713 0.125361 90 0.845731 0.130002 150 0.835644 0.126602 210 0.826091 0.123332 270 0.760372 0.11732 330 0.817078 0.131282