Work

Majorana Dark Matter and Neutrino mass in a singlet-doublet extension of the Standard Model

Year: 2021

Type: preprint

Abstract: A minimal extension of the Standard Model (SM) by a vector-like fermion doublet and three right handed (RH) singlet neutrinos is proposed in order to explain dark matter and tiny neutrino mass simultaneously. The DM arises as a mixture of the neutral component of the fermion doublet and one of the RH neutrinos, both assumed to be odd under an imposed $\mathcal{Z}_2$ symmetry. Being Majorana in nature, the DM escapes from $Z$-mediated direct search constraints to mark a significant difference from singlet-doublet Dirac DM. The other two $\mathcal{Z}_2$ even heavy RH neutrinos give rise masses and mixing of light neutrinos via Type-I Seesaw mechanism. Relic density and direct search allowed parameter space for the model is investigated through detailed numerical scan.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2106.13857

Authors: Dutta, Manoranjan, Bhattacharya, Subhaditya, Ghosh, Purusottam, Sahu, Narendra

Institutions: Indian Institute of Technology Hyderabad, Indian Institute of Technology Guwahati, Harish-Chandra Research Institute

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: green

OpenAlex ID: W4302016205

Cites: 8

Cited by: 3

Related to: 10