CLAS physics database search results Measurement E159M351 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.923415 0.128568 90 0.898249 0.119752 150 0.978212 0.13281 210 1.02369 0.139007 270 0.919875 0.123282 330 0.886422 0.122776