CLAS physics database search results Measurement E159M848 E1-6 V. Burkert 2001 psi(p) dsigma/dpsi_pr Stat. error deg mcb/rad mcb/rad 30 0.331118 0.0695906 90 0.345104 0.0601482 150 0.37102 0.0872454 210 0.33893 0.0679278 270 0.350275 0.0704464 330 0.342943 0.0645739