Speaker
Niloy Mondal
(Student)
Description
We investigate a model connecting the neutrino sector and the dark sector of the universe through a mediator $\phi$. This mediator is stabilized by a discrete $\mathcal{Z}_4$ symmetry, which, upon $\phi$ developing a non-zero vacuum expectation value ($v_{\phi}$), reduces to a remnant $\mathcal{Z}_2$ symmetry. Within this framework, the observed baryon asymmetry of the universe is explained by additional (scattering) contributions to the standard Type-I leptogenesis mechanism. The symmetry-breaking scale ( $v_{\phi}$) not only links the neutrino sector and the dark sector but also has the potential to produce gravitational wave signals (via domain wall annihilation) detectable by current and future experiments.
| Field of contribution | Phenomenology |
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Authors
Drona Vatsyayan
Niloy Mondal
(Student)
Dr
Rishav Roshan
(University of Southampton)
Subhaditya Bhattacharya
