CLAS physics database search results Measurement E62M536 E-94-005 CLAS experiment L. Elouadrhiri 2006 psi(pi+) dsigma/dpsi_pip Data errors deg mcbn/rad mcbn/rad 60 0.673522 0.14701873 180 0.83401376 0.13150112 299.99997 0.37048227 0.062372167