CLAS physics database search results Measurement E159M414 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.704133 0.101124 90 0.701186 0.102279 150 0.864102 0.12126 210 0.984361 0.144442 270 0.690214 0.0982974 330 0.70241 0.104997