CLAS physics database search results Measurement E159M65 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.72153 0.126757 90 0.688466 0.108856 150 0.680594 0.116228 210 0.652739 0.109251 270 0.697259 0.113735 330 0.691615 0.119351