CLAS physics database search results Measurement E159M380 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Data errors deg mcb/rad mcb/rad 30 0.83089 0.127248 90 0.785256 0.124355 150 0.848551 0.136545 210 0.877916 0.141173 270 0.756964 0.112794 330 0.776813 0.129817