A bstract Using the topological-diagram approach based on SU (3) flavor symmetry, we investigate two-body c^+ BS Λ c + → B S decays, where B denotes the final-state baryon and S refers to a light scalar meson, such as f 0 / f 0 (980), a 0 / a 0 (980), σ 0 / f 0 (500), or /K₀^ (700) κ / K 0 ∗ 700. Our analysis indicates that interpreting the light scalar mesons as tetraquark states provides a more consistent description of the currently available experimental data. In particular, this framework naturally accommodates the experimentally observed branching fraction B (c^+ a₀^+) B Λ c + → Λ a 0 +, which exceeds predictions based solely on long-distance effects by an order of magnitude. Within the tetraquark scenario, we predict B (c^+ ^+f₀) = (4. 9 1. 9) 10^-2 B Λ c + → Σ + f 0 = 4. 9 ± 1. 9 × 10 − 2 and B (c^+ pf₀) = (3. 6 1. 4) 10^-3 B Λ c + → p f 0 = 3. 6 ± 1. 4 × 10 − 3. Owing to f 0 − σ 0 mixing, B (c^+ ^+₀) B Λ c + → Σ + σ 0 and <jats: tex-
Wang et al. (Mon,) studied this question.