Beijing Spectrometer(BESIII) Experiment----Institute of High Energy Physics

Introduction To BESIII Experiment

BESIII at the BEPCII accelerator is a major upgrade of BESII at the BEPC for the studies of hadron physics and τ-charm physics with the highest accuracy achieved until now. The peak luminosity of the double-ring e+e- collider, BEPCII, is 10^33cm^-2s^-1 at center-of-mass energy 3.78 GeV. The cylindrical core of the BESIII detector consists of a helium-based multilayer drift chamber (MDC), a plastic scintillator time-of-flight system (TOF), and a CsI(Tl) electromagnetic calorimeter (EMC), which are all enclosed in a superconducting solenoidal magnet providing a... More

Highlights

BESIII Observes Polarization of Baryons in J/ψ Decay
The BESIII collaboration observed baryon polarization in baryon-antibaryon (matter-antimatter particle) events from J/ψ particles produced at the BEPCII collider. The paper was published in Nature...

BESIII Observes New Leptonic Decay Mode for D Meson
The BESIII collaboration has reported the world's first observation of the decay D+ → τ+ν in a newly published Physical Review Letters paper that has been highlighted by the journal as an "Editors'...

BESIII Accumulates 10 Billion J/ψ Events
The BESIII detector finished accumulating a sample of 10 billion J/ψ events together with a continuum data sample on Feb. 11. The 10 billion J/ψ-event sample accumulated at BESIII is the world's...

Observation of a_0^0 (980)-f_0 (980) Mixing at BESIII
The first observation of a_0^0 (980)-f_0 (980) mixing at BESIII experiment was published recently in Physical Review Letters as a letter of “Editors’ Suggestion”.

Zc(3900) is on the top of the "Highlights of the Year"
Quarks come in twos and threes—or so nearly every experiment has told us. This summer, the BESIII Collaboration in China and the Belle Collaboration in Japan reported they had sorted through the...