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We study the possibility of realising leptogenesis from three body decay,dark matter (DM) and neutrino mass in a minimal framework. We propose a firstof its kind model to implement the idea of leptogenesis from three body decaywhere CP asymmetry arises from interference of multiple $1 \rightarrow 3$diagrams using resummed propagators along with DM. The standard model isextended by three heavy singlet fermions, one scalar singlet and one scalardoublet with appropriate discrete charges. Two of these singlet fermions notonly play non-trivial roles in generating light neutrino mass at radiativelevel in scotogenic fashion, but also act as mediators in three body decay ofthe third singlet fermion leading to desired CP asymmetry through interferenceof such diagrams. With just one additional field compared to the minimalscotogenic model, we show that successful leptogenesis can occur at a scale aslow as approximately 1 TeV which is much lower than the leptogenesis scalefound for minimal scotogenic model. Also, the realisation of this three bodydecay leptogenesis naturally leads to a two component scalar singlet-doubletdark matter scenario offering a rich phenomenology. Apart from havinginteresting interplay of different couplings involved in processes related toboth leptogenesis and dark matter, the model can also be tested at differentexperiments due to the existence of its particle spectrum at TeV scale.

Dark Sector Assisted Low Scale Leptogenesis from Three Body Decay