CLAS physics database search results Measurement E159M388 E1-6 V. Burkert 2001 psi(pi+) dsigma/dpsi_pip Data errors deg mcb/rad mcb/rad 30 0.772335 0.111937 90 0.732517 0.103639 150 0.941246 0.132826 210 0.97925 0.137978 270 0.744667 0.105024 330 0.759183 0.108624