CLAS physics database search results Measurement E1M556 E93-006 CLAS experiment V. D. Burkert, M. Ripani 2003 psi(pi-) dsigma/dpsi_pim Stat. error deg mcbn/rad mcbn/rad 36 2.6237326 0.18908344 108 3.0145473 0.14525656 180 4.0282383 0.22406131 251.99998 2.9223254 0.13396777 324 2.6532955 0.15589511