Bottom baryon decays into light meson and dark baryon within perturbative QCD approach

In the work, we study the production of dark baryon $ψ$ with the bottom-baryon decays $Λ_b\to M ψ$ under the perturbative QCD approach. For the Type-I/II models in B-Mesogenesis scenarios, we calculate the form factors for bottom-baryon decays into meson. Using these results, we obtain branching ratios for $Λ_b\to M ψ$ decays. The PQCD approach calculations show these branching ratios reach $\mathcal{O}(10^{-5})$ in both models, with $\mathcal{B}(Λ_b\to Kψ)$ specifically reaching $\mathcal{O}(10^{-4})$ in Type-II. These accessible magnitudes make the predictions testable at the LHCb and B-factories with improved precision.