Majorana fermion dark matter in minimally extended left-right symmetric model

Journal Article · 06 September 2021 · Journal of High Energy Physics (Online)

DOI: https://doi.org/10.1007/jhep09(2021)038 · OSTI ID:1851627

Neves, M. J. ^[1]; Okada, Nobuchika ^[2]; Okada, Satomi ^[2]

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1. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy; Universidade Federal Rural do Rio de Janeiro (Brazil). Dept. de Física; Univ. of Alabama, Tuscaloosa, AL (United States)
2. Univ. of Alabama, Tuscaloosa, AL (United States). Dept. of Physics and Astronomy

We present a minimal extension of the left-right symmetric model based on the gauge group SU(3)_c × SU(2)_L × SU(2)_R × U(1)_B–L × U(1)_X, in which a vector-like fermion pair (ζ_L and ζ_R) charged under the U(1)_B–L × U(1)X symmetry is introduced. Associated with the symmetry breaking of the gauge group SU(2)_R × U(1)_B–L × U(1)_X down to the Standard Model (SM) hypercharge U(1)_Y, Majorana masses for ζ_L,R are generated and the lightest mass eigenstate plays a role of the dark matter (DM) in our universe by its communication with the SM particles through a new neutral gauge boson “X”. We consider various phenomenological constraints of this DM scenario, such as the observed DM relic density, the LHC Run-2 constraints from the search for a narrow resonance, and the perturbativity of the gauge couplings below the Planck scale. Combining all constraints, we identify the allowed parameter region which turns out to be very narrow. A significant portion of the currently allowed parameter region will be tested by the High-Luminosity LHC experiments.

• Research Organization: Univ. of Alabama, Tuscaloosa, AL (United States)
• Sponsoring Organization: Brazilian National Council for Scientific and Technological Development (CNPq); USDOE Office of Science (SC)
• Grant/Contract Number: SC0012447
• OSTI ID: 1851627
• Journal Information: Journal of High Energy Physics (Online), Journal Name: Journal of High Energy Physics (Online) Journal Issue: 9 Vol. 2021; ISSN 1029-8479
• Publisher: Springer NatureCopyright Statement
• Country of Publication: United States
• Language: English