CLAS physics database search results Measurement E159M477 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.331185 0.0569308 90 0.329389 0.0450692 150 0.39807 0.0579221 210 0.468955 0.0655736 270 0.382764 0.0544808 330 0.354053 0.0634952