CLAS physics database search results Measurement E159M244 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.269878 0.0361711 90 0.288518 0.0414003 150 0.441289 0.0598805 210 0.372468 0.0510367 270 0.256024 0.0351147 330 0.339287 0.0474635