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Doublet-singlet model and unitarity

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arxiv 1509.05323 v2 pith:UREUR7ZK submitted 2015-09-17 hep-ph gr-qc

G. Cynolter , J. Kovacs , E. Lendvai This is my paper · ORCID
classification hep-phgr-qc
keywords modelcandidatecouplingsdarkmatterunitarityyukawaallow
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

We study the renormalizable singlet-doublet fermionic extension of the Standard Model. In this model, the new vector-like fermions couple to the gauge bosons and to the Higgs via new Yukawa couplings, that allow for nontrivial mixing in the new sector, providing a stable, neutral dark matter candidate. Approximate analytic formulae are given for the mass spectrum around the blind spots, where the dark matter candidate coupling to $h$ or $Z$ vanishes. We calculate the two particle scattering amplitudes in the model, impose the perturbative unitarity constraints and establish bounds on the Yukawa couplings.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Singlet-Doublet fermion origin of dark matter, neutrino mass and inverse first-order electroweak phase transition

    hep-ph 2026-08 conditional novelty 6.0 of 10

    New singlet and doublet fermions, a scalar singlet, and right-handed neutrinos can simultaneously explain Dirac neutrino masses, dark matter, and a two-step inverse electroweak phase transition with observable gravita...

  2. Gravitational Wave Probe of Singlet-Doublet Dark Matter Induced Radiative Neutrino Mass

    hep-ph 2025-11 conditional novelty 5.0 of 10

    A radiative-seesaw model with singlet-doublet dark matter can satisfy neutrino, muon, flavor, relic, and direct-detection constraints while producing a first-order electroweak phase transition with gravitational waves...

  3. Impact of conversion-driven processes on singlet-doublet Majorana dark matter relic

    hep-ph 2025-11 conditional novelty 4.0 of 10

    For Majorana singlet-doublet dark matter, including conversion-driven processes enlarges the relic-density- and direct-detection-allowed mixing range to sinθ≈2×10^-7–0.16 for M_DM up to ~1750 GeV.

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