CLAS physics database search results Measurement E159M46 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.614976 0.0961441 90 0.666165 0.100359 150 0.881109 0.129227 210 0.805515 0.11463 270 0.527055 0.0856918 330 0.552356 0.0811009