CLAS physics database search results Measurement E159M47 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.705315 0.114253 90 0.723041 0.115596 150 0.842687 0.134694 210 0.696262 0.113719 270 0.674235 0.108732 330 0.728595 0.129701