CLAS physics database search results Measurement E159M361 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.786135 0.108748 90 0.785009 0.109112 150 0.927077 0.128956 210 0.895065 0.127011 270 0.761426 0.106769 330 0.796433 0.108503