CLAS physics database search results Measurement E159M504 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Stat. error deg mcb/rad mcb/rad 30 0.285877 0.0545042 90 0.316637 0.0481727 150 0.380066 0.0548383 210 0.34763 0.0536917 270 0.299895 0.0436977 330 0.259871 0.0421406