CLAS physics database search results Measurement E62M428 E-94-005 CLAS experiment L. Elouadrhiri 2006 psi(pi+) dsigma/dpsi_pip Data errors deg mcbn/rad mcbn/rad 60 0.48313192 0.072150677 180 0.73765993 0.16433571 299.99997 0.39741641 0.060271677