Charmed baryon decays: SU(3)F breaking and CP violation

A bstract We present a comprehensive study of anti-triplet charmed baryon decays into octet baryons and pseudoscalar mesons using the SU (3) F flavor symmetry framework. By decomposing the flavor structure, all decay amplitudes are parametrized with a minimal set of irreducible amplitudes, and the Körner-Pati-Woo theorem further reduces the number of independent parameters from the original 35 to 19 under exact symmetry when small terms proportional to b=V₂₁^ Vₔ₁ λ b = V cb ∗ V ub are neglected. The independent number becomes 27 with leading SU (3) F breaking effects. A global fit to 51 experimental measurements yields a χ 2 /d. o. f. of 2. 36 and provides precise values for the decay amplitudes. Notable discrepancies are observed in the fitted branching fractions of c⁰ ^-^+ Ξ c 0 → Ξ − π + and c^+ ^-^+^+ Ξ c + → Ξ − π + π +, which exceed current measurements by more than 2 σ. Incorporating final-state rescattering effects to recover the main effects of terms proportional to λ b, we predict enhanced CP violation, with A CP reaching up to 10 − 3 in golden channels such as c⁰ pK^- Ξ c 0 → p K − and c⁰ ^+^- Ξ c 0 → Σ + π −. Our analysis also finds that the branching ratio for c^+ ^+ Ξ c + → Λ π + is enhanced to (9. 7 ± 1. 2) × 10 − 4 due to significant cancellations.