CLAS physics database search results Measurement E159M415 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.75308 0.108167 90 0.717248 0.103232 150 0.919549 0.133244 210 0.81873 0.117182 270 0.677945 0.0985014 330 0.719412 0.103651