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This home page is intended for BES Collaboration, Some links require access authorization. Is a general-purpose detector located in the interaction region at the BEPC storage ring. Where the electron and positron beams collide. The BES Collaboration consists of approximately 200 physicists and engineers from 27 institutions in 4 countries. This website is hosted at Institute of High Energy Physics. Major Upgrade of BEPC Carried Out in An All Round Way.
Coll Meeting in Winter of 2017, Dec. 2 -6, 2017, IHEP, Beijing. New Vector Particles Observed at BESIII. The first direct measurement on the Λ. Observation of a charged charmoniumlike structure at BESIII. The results were described in APS weekly letter.