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arXiv · 2312.15053

Leptogenesis, Dark Matter and Gravitational Waves from Discrete Symmetry Breaking

Subhaditya Bhattacharya·Niloy Mondal·Rishav Roshan·Drona Vatsyayan
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Abstract

We analyse a model that connects the neutrino sector and the dark sector of the universe via a mediator $\Phi$, stabilised by a discrete $Z_4$ symmetry that breaks to a remnant $Z_2$ upon $\Phi$ acquiring a non-zero vacuum expectation value ($v_\phi$). The model accounts for the observed baryon asymmetry of the universe via additional contributions to the canonical Type-I leptogenesis. The $Z_4$ symmetry breaking scale ($v_\phi$) in the model not only establishes a connection between the neutrino sector and the dark sector, but could also lead to gravitational wave signals that are within the reach of current and future experimental sensitivities.

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Subhaditya Bhattacharya, Niloy Mondal, Rishav Roshan, Drona Vatsyayan. 2023-12-22. Leptogenesis, Dark Matter and Gravitational Waves from Discrete Symmetry Breaking. https://doi.org/10.1088/1475-7516%2F2024%2F06%2F029

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