The first measurement of the semileptonic decay Ξ⁻ → Λ e⁻ νbar_e
The BESIII Collaboration has reported the first measurement of the semileptonic decay Ξ⁻ → Λ e⁻ νbare at an electron-positron collider, providing the first determination of its absolute branc...

BESIII Experiment Identifies X(2370) as a Glueball-dominated Particle
At the International Conference on High Energy Physics held in Brazil, the BESIII Collaboration at the Beijing Electron Positron Collider announced in a special plenary report that after fifteen ye...

BESIII Sets New Bound for Sub-GeV Dark Matter Interactions
The BESIII Collaboration recently reports the search for sub-GeV dark particles in η→π⁰+invisible decay and provides a new bound for the sub-GeV dark matter, which has been published in Physica...

BESIII Reports First Measurements of Antineutron–Proton Annihilation into Multi-Pion Final States
Recently, the BESIII collaboration has reported new results on antineutron–proton interactions by measuring the annihilation processes n̄ p → 2 π+ π-, n̄ p → 2 π+ π- π0, and n̄ p → 2 π...