First Amplitude Analysis of D⁰→K⁻π⁰e⁺νₑ and Observation of D⁰→K*₂(1430)⁻e⁺νₑ
The BESIII Collaboration has observed the spin‑2 strange meson K₂(1430)⁻ in the semileptonic decay D⁰→K⁻π⁰e⁺νₑ for the first time with a significance of 7.9σ. The first amplitude analys...

BESIII Reports Precision Studies and Searches for CP Asymmetries in the Inclusive Charmed-Baryon Decay
Recently, the BESIII Collaboration carried out a precision study of the inclusive charmed-baryon decay Λc⁺ → ΛX. The study reports the first measurement of the longitudinal polarization of the ...

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 ...