CLAS physics database search results Measurement E159M387 E1-6 V. Burkert 2001 psi(pi-) dsigma/dpsi_pim Data errors deg mcb/rad mcb/rad 30 0.755593 0.107502 90 0.771135 0.109877 150 0.989478 0.138925 210 1.00388 0.141131 270 0.773602 0.111021 330 0.754104 0.106976