CLAS physics database search results Measurement E159M126 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 1.14676 0.151474 90 1.22469 0.161048 150 1.33768 0.178189 210 1.30715 0.174304 270 1.27466 0.167292 330 1.13561 0.150425