CLAS physics database search results Measurement E159M245 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.300318 0.0503443 90 0.355249 0.05321 150 0.348209 0.0594615 210 0.381701 0.0609897 270 0.286361 0.0431545 330 0.284289 0.0474672