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

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 λb = Vcb^*Vub are neglected. The independent number becomes 27 with leading SU(3)F breaking effects. A global fit to 51 experimental measurements yields a χ²/d.o.f. of 2.36 and provides precise values for the decay amplitudes. Notable discrepancies are observed in the fitted branching fractions of Ξc⁰ → Ξ⁻ π⁺ and Ξc⁺ → Ξ⁻ π⁺ π⁺, which exceed current measurements by more than $2σ$. Incorporating final-state rescattering effects to recover the main effects of terms proportional to λb, we predict enhanced CP violation, with ACP reaching up to 10⁻³ in golden channels such as Ξc⁰ → p K⁻ and Ξc⁰ → Σ⁺ π⁻. Our analysis also finds that the branching ratio for Ξc⁺ → Λπ⁺ is enhanced to (9.7 ± 1.2) × 10⁻⁴ due to significant cancellations.