CLAS physics database search results Measurement E1M61 E93-006 CLAS experiment V. D. Burkert, M. Ripani 2003 psi(pi+) dsigma/dpsi_pip Stat. error deg mcbn/rad mcbn/rad 36 1.3223572 0.33684924 108 1.9237484 0.66345423 180 2.280957 0.46237609 251.99998 1.2145029 0.22804247 324 1.3267133 0.33054543