AI and the World's Hard Problems · Physics · arXiv · 2026-10-21
Charmed baryon decays at BESIII
BESIII has accumulated 6.4 fb⁻¹ of e⁺e⁻ collision data at center-of-mass energies from 4.60 to 4.95 GeV, the world's largest sample of Λc⁺Λ̄c⁻ pairs, and this work reports recent results on charmed baryon decays. Using deep-learning techniques, the first observations of Λc⁺→ne⁺νₑ and Λc⁺→nπ⁺η were achieved, alongside the first observation of the transverse polarization of the Λc⁺ in e⁺e⁻→Λc⁺Λ̄c⁻ and a precision measurement of the inclusive decay Λc⁺→ΛX. The results also include the first observation of Λc⁺→pK⁻e⁺νₑ with evidence for Λc⁺→Σ±π∓e⁺νₑ, and partial wave analyses of Λc⁺→Λπ⁺η.