CLAS physics database search results Measurement E62M632 E-94-005 CLAS experiment L. Elouadrhiri 2006 psi(pi+) dsigma/dpsi_pip Data errors deg mcbn/rad mcbn/rad 60 0.38577756 0.077955276 180 0.71124017 0.23866796 299.99997 0.37347889 0.062224235