CLAS physics database search results Measurement E159M424 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.784166 0.114901 90 0.68456 0.0998917 150 0.88808 0.127848 210 0.843476 0.118783 270 0.628359 0.0909902 330 0.801065 0.118847