%0 Journal Article %T Trigger efficiencies at BES III %A N. Berger %A K. Zhu %A Z. A. Liu %A D. P. Jin %A H. Xu %A W. X. Gong %A K. Wang %A G. F. Cao %J Physics %D 2010 %I arXiv %R 10.1088/1674-1137/34/12/001 %X Trigger efficiencies at BES III were determined for both the J/psi and psi' data taking of 2009. Both dedicated runs and physics datasets are used; efficiencies are presented for Bhabha-scattering events, generic hadronic decay events involving charged tracks, dimuon events and psi' -> pi+pi-J/psi, J/psi -> l+l- events (l an electron or muon). The efficiencies are found to lie well above 99% for all relevant physics cases, thus fulfilling the BES III design specifications. %U http://arxiv.org/abs/1011.2825v1