2021/03/16 by M. J. Neves, Neves, M. J., Nobuchika Okada +3 · 1 citation
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Nongalactic Astrophysics (astro-ph.CO) #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies
paper · pdf · doi:10.48550/arxiv.2103.08873
openalex publication_date 2021/03/16 · openalex created_date 2021/03/29 · openalex updated_date 2026/08/01
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 (ζL and ζR) 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 ζL, 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.