CLAS physics database search results Measurement E159M524 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Stat. error deg mcb/rad mcb/rad 30 0.424179 0.0753279 90 0.364004 0.0701168 150 0.449417 0.0831838 210 0.402919 0.0749975 270 0.38652 0.0834575 330 0.44349 0.0897096