CLAS physics database search results Measurement E159M423 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.75002 0.111955 90 0.7322 0.109322 150 0.917837 0.131116 210 0.943239 0.136666 270 0.708076 0.100513 330 0.681517 0.100313