CLAS physics database search results Measurement E159M101 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.905985 0.146327 90 0.832185 0.127723 150 1.01441 0.156418 210 1.04828 0.15697 270 0.945071 0.147291 330 0.961232 0.174445