BESIII achieves the first complete determination of the spin density matrix in ψ(3686) → Λ Λbar
The BESIII Collaboration has achieved the first complete determination of the spin density matrix in the decay ψ(3686) → Λ Λbar, providing a unified experimental framework for studying both hyp...

BESIII Achieves World's Most Precise Measurement of Lambda Hyperon Electric Dipole Moment
The BESIII Collaboration has achieved the world's most precise measurement of the electric dipole moment (EDM) of the Lambda (Λ) hyperon using quantum-entangled Λ–anti-Λ pairs produced in J/ψ ...

BESIII Observes Transverse Polarization of Charmed Baryons for the First Time
he BESIII Collaboration has observed, for the first time, transverse polarization of the lightest charmed baryon, the Λ₊⁺, produced in electron-positron annihilation near the production threshol...

Quantum-entangled hyperons open a new route to testing the Standard Model
BESIII pioneers a study of baryon semileptonic decays through polarization and quantum entanglement, including the first semileptonic form-factor measurements for an antihyperon.