CLAS physics database search results Measurement E159M379 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.68957 0.0954467 90 0.789919 0.12151 150 0.891599 0.123762 210 0.845081 0.117526 270 0.73782 0.106949 330 0.777196 0.108703