CLAS physics database search results Measurement E159M100 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.776735 0.111307 90 0.821225 0.122429 150 1.09274 0.157932 210 1.11835 0.162919 270 0.844876 0.121921 330 0.893147 0.128236