CLAS physics database search results Measurement E159M135 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 1.00728 0.137846 90 1.17937 0.161043 150 1.14478 0.156949 210 1.30715 0.17832 270 1.12622 0.153625 330 1.005 0.139453