Quasi-Dirac Heavy Neutral Leptons in the Left-Right Symmetric Model

2024/06/19 by Oleksii Mikulenko, Mikulenko, Oleksii
Physics and Astronomy · Social Sciences · #Crystallography and Radiation Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #International Science and Diplomacy #Particle physics theoretical and experimental studies

paper · pdf · doi:10.48550/arxiv.2406.13850

openalex publication_date 2024/06/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/01

Abstract

We discuss the phenomenology of a pair of degenerate GeV-scale Heavy Neutral Leptons within the Left-Right Symmetric Model (LRSM) framework, with the third fermion serving as a dark matter candidate. We highlight the potential of the recently approved SHiP experiment to test the existence of the light DM species, and the signatures of lepton number violation as a possible experimental probe of the model in various experiments. Our findings include concrete predictions, in some part of the model's parameter space, for the effective right-handed couplings (V^R_e)²:(V^R_μ)²:(V^R_τ)² = 0.16:0.47:0.38 (normal neutrino hierarchy), 0.489 : 0.22 : 0.30 (inverted hierarchy) of the degenerate pair.

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