Work

Decaying scalar dark matter in the minimal left-right symmetric model

Year: 2025

Type: article

Abstract: In the minimal left-right symmetric theory, the dark matter candidate is usually ascribed to the lightest right-handed neutrino. Here we present an alternative decaying dark matter candidate in this model in terms of the lightest neutral scalar from the S U ( 2 ) R -triplet field. This setup requires a vast hierarchy between the scalar mass and the left-right symmetry breaking scale, which renders the scalar dark matter sufficiently stable on cosmological time scales. The stability of the dark matter imposes constraints on the right-handed neutrino mass, which has consequences for the neutrino mass generation, as well as for leptogenesis. Although somewhat fine-tuned, it provides a very economical scenario wherein the minimal left-right model can simultaneously explain dark matter, neutrino masses, and the matter-antimatter asymmetry of the Universe.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/x6x1-76p8

Authors: P. S. Bhupal Dev, Julian Heeck, Anil Thapa

Institutions: Washington University in St. Louis, University of Virginia, Colorado State University

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: U.S. Department of Energy

Awards: THEORETICAL AND EXPERIMENTAL STUDIES IN PARTICLE PHYSICS AND COSMOLOGY, THE UNIVERSITY OF VIRGINIA EXPERIMENTAL HIGH ENERGY PHYSICS AT THE ENERGY FRONTIER