CLAS physics database search results Measurement E159M315 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.693913 0.0945325 90 0.773514 0.100486 150 0.909509 0.123845 210 0.821522 0.10894 270 0.754485 0.0976986 330 0.679223 0.0935296