CLAS physics database search results Measurement E62M631 E-94-005 CLAS experiment L. Elouadrhiri 2006 psi(pi-) dsigma/dpsi_pim Data errors deg mcbn/rad mcbn/rad 60 0.43902835 0.088623025 180 0.5537976 0.13813242 299.99997 0.59469682 0.12509629