Exploring Leptogenesis, WIMP Dark Matter, and Gravitational Waves in an extended Scalar Framework
Subhaditya Bhattacharya, Niloy Mondal, Arunansu Sil

TL;DR
This paper investigates an extended scalar framework linking neutrino mass, leptogenesis, dark matter, and gravitational waves through a $ ext{Z}_4 imes ext{CP}$ symmetry, proposing a unified scenario with testable gravitational wave signals.
Contribution
It introduces a novel $ ext{Z}_4 imes ext{CP}$ symmetric model connecting neutrino mass, leptogenesis, dark matter, and gravitational waves, with detailed symmetry breaking and domain wall analysis.
Findings
Viable $ ext{Z}_4 imes ext{CP}$ symmetry for neutrino and dark matter stability
Prediction of gravitational wave signals from domain wall annihilation
Correlation between symmetry breaking scale and observable phenomena
Abstract
We explore extensions of type I seesaw framework with a scalar mediator () connecting to a complex scalar dark field (), and right handed neutrinos (), with an aim to correlate neutrino mass generation, leptogenesis, and dark matter. turns out to be a phenomenologically viable choice of the extended symmetry, which can accommodate a dimension five effective interaction , involving the SM lepton isodoublet , and Higgs ; prohibiting the canonical Yukawa term . The symmetry is spontaneously broken via the vacuum expectation value (VEV) of the filed, which directly affects neutrino mass generation and leptogenesis; while the symmetry stabilises one component of , making it a viable dark matter candidate. The discrete symmetry breaking creates…
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Taxonomy
TopicsParticle physics theoretical and experimental studies · Dark Matter and Cosmic Phenomena · Neutrino Physics Research
