CLAS physics database search results Measurement E159M846 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.319176 0.0528977 90 0.324453 0.0538093 150 0.349885 0.0546876 210 0.385749 0.0627522 270 0.286683 0.0470091 330 0.302689 0.0528689