CLAS physics database search results Measurement E159M343 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 1.1853 0.155835 90 0.940354 0.124006 150 1.25677 0.164962 210 1.24601 0.165859 270 0.983724 0.129238 330 1.11315 0.144798