CLAS physics database search results Measurement E159M110 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 1.35545 0.214199 90 1.14212 0.166393 150 1.43037 0.212141 210 1.16359 0.165809 270 1.19148 0.172641 330 1.41024 0.217865