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

In the work, we study the production of dark baryon $\psi$ with the bottom-baryon decays ${\mathrm{\Lambda }}_b\to M\psi$ 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 ${\mathrm{\Lambda }}_b\to M\psi$ decays. The PQCD approach calculations show these branching ratios reach $\mathcal{O}({10}^{-5})$ in both models, with $\mathcal{B}({\mathrm{\Lambda }}_b\to K\psi )$ 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.