User Information


Precise Electromagnetic Structure of Neutron Measured at BESIII The BESIII collaboration presented measurements of the neutron’s electromagnetic (EM) structure in the time-like region with unprecedented precision. The new BESIII results clarify the photon-nucleon interaction puzzle that has persisted for over 20 years, and a surprising periodic structure is observed on the nucleon effective form factors. The manuscript is featured on the cover of the Nature Physics issue of Nov.8th, 2021.
Observation of the Zcs(3985) strange four-quark meson In the March 12th, 2021 issue of Physical Review Letters, the BESIII collaboration reports the discovery of an exotic multi-quark structure, dubbed the Zcs(3985), that is produced in the process of e^+ e^-→K^+ (D_s^- D^(*0)+D_s^(*-) D^0) at an e^+ e^- center-of-mass energy of 4.68 GeV. The Zcs(3985) is observed to decay to a charged strange-charmed meson plus a neutral charmed meson, i.e., D_s^- D^(*0)+D_s^(*-) D^0, and has a mass of 3.98 GeV/c2. This is the first candidate for a tetra-quark meson containing hidden-charm with non-zero strangeness. This paper was selected as one of that issue’s and "Editors' Suggestion" and prominently featured on the APS synopsis website.
White Paper on the Future Physics Programme of BESIII The BESIII Collaboration officially released a draft version of its White Paper on the Future Physics Programme of BESIII ("white paper") at on Dec. 13. Feedback on the paper from international peers will be collected for two weeks. The release of the white paper signifies a new stage for BESIII physics research and China’s experimental hadron physics research.
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 Physics on May 6.
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' Suggestion.” This is the second type of pure leptonic decay of the D+ meson.
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 largest data sample produced directly from electron-positron annihilations.