CLAS physics database search results Measurement E159M299 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.651634 0.103174 90 0.514171 0.0774755 150 0.498418 0.0758284 210 0.526225 0.0833495 270 0.4677 0.0746812 330 0.633553 0.103559