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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