CLAS physics database search results Measurement E159M325 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.768555 0.0982411 90 0.817503 0.105773 150 1.04959 0.134372 210 1.17103 0.152102 270 0.972353 0.130065 330 0.869115 0.11131