of Alabama, Tuscaloosa, AL (United States) Sponsoring Org.: USDOE Office of Science (SC) Brazilian National Council for Scientific and Technological Development (CNPq) OSTI Identifier: 1851627 Grant/Contract Number: SC0012447 313467/2018-8 Resource Type: Accepted Manuscript Journal Name: Journal of High Energy Physics (Online) Additional Journal Information: Journal Name: Journal of High Energy Physics (Online) Journal Volume: 2021 Journal Issue: 9 Journal ID: ISSN 1029-8479 Publisher: Springer Nature Country of Publication: United States Language: English Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS physics beyond standard model cosmology of theories beyond the SM = $$ have Yukawa coupling with the SM lepton doublets and play an essential role for the “minimal seesaw” mechanism, NR is isolated from the SM particles due to its U(1) X charge and hence it is a natural candidate for the dark matter (DM) without invoking additional symmetries. Publication Date: Tue Sep 07 00:00: Research Org.: Univ. of Alabama, Tuscaloosa, AL (United States). of Physics and Astronomy Universidade Federal Rural do Rio de Janeiro (Brazil). A significant portion of the currently allowed parameter region will be tested by the High-Luminosity LHC experiments. Combining all constraints, we identify the allowed parameter region which turns out to be very narrow. 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. 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 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.
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