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Vacuum (in)stability in 2HDMS vs N2HDM

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arxiv 2408.13592 v2 pith:BRKEAMEY submitted 2024-08-24 hep-ph

classification hep-ph
keywords vacuumhdmsmodelsn2hdmstabilitycouplingsfurtherscenario
verification ladder T0 review T1 audit T2 compute T3 formal
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In this work, we examine the criteria for vacuum stability in two models with extended scalar sectors namely, the N2HDM and the 2HDMS and make a detailed comparison between the two. For the purpose of demonstration, we choose a scenario which can accommodate the recently observed 95 GeV excess in both models. We further explore the impact of the measurement of the Yukawa couplings, the gauge boson couplings and most importantly the trilinear self-couplings of the scalars, in distinguishing the vacuum structure in both models. We further investigate the constraints from vacuum stability on the 2HDMS scenario that accommodates a viable dark matter candidate and compare it with the N2HDM case.

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Cited by 1 Pith paper

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

  1. Vacuum Instability and False Vacuum Decay Induced by Domain Walls in the N2HDM

    hep-ph 2025-06 conditional novelty 6.0 of 10

    Domain walls in the N2HDM can erase the barrier around the electroweak vacuum, making long-lived metastable vacua decay classically and excluding parameter points previously considered viable.

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