CLAS physics database search results Measurement E1M263 E93-006 CLAS experiment V. D. Burkert, M. Ripani 2003 psi(pi+) dsigma/dpsi_pip Stat. error deg mcbn/rad mcbn/rad 36 1.6314626 0.34210846 108 1.7696429 0.30546129 180 2.4005373 0.24243456 251.99998 1.5290856 0.23161185 324 1.3621475 0.26466426