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We studied the decays of Heavy baryon into a pseudoscalar meson and a darkbaryon in the recently developed $B$-Mesogenesis scenario, where the two typesof effective Lagrangians proposed by the scenario are both considered. Thedecay amplitudes of $\Lambda_b^0$ are calculated by light-cone sum rules usingits light-cone distribution amplitudes. The decay amplitudes of $\Xi_b^{0,\pm}$are related with those of $\Lambda_b^0$ through a flavor SU(3) analysis. Theuncertainties of threshold parameter and the Borel parameter are bothconsidered in the numerical calculation. The values of effective couplingconstants in the $B$-Mesogenesis are taken as their upper limits that obtainedfrom our previous study on the inclusive decay. The upper limits of the decaybranching fractions are presented as functions of the dark baryon mass.

Heavy baryon decays into light meson and dark baryon within LCSR