CLAS physics database search results Measurement E159M154 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 1.00487 0.152738 90 0.951003 0.142234 150 1.23252 0.181191 210 1.2986 0.194119 270 0.984544 0.145227 330 0.940707 0.141628