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- W4387561247 abstract "We analyse new signals of a 3-Higgs Doublet Model (3HDM) at the Large Hadron Collider (LHC) where only one doublet acquires a Vacuum Expectation Value (VEV), preserving a $Z_2$ parity. The other two doublets are textit{inert} and do not develop a VEV, leading to a textit{dark scalar sector} controlled by $Z_2$, with the lightest CP-even dark scalar $H_1$ being the Dark Matter (DM) candidate. This leads to the loop induced decay of the next-to-lightest scalar, $H_2 to H_1 ell bar ell $ ($ell =e,mu$), mediated by both dark CP-odd neutral and charged scalars. This is a smoking-gun signal of the 3HDM since it is not allowed in the 2-Higgs Doublet Model (2HDM) with one inert doublet and is expected to be important when $H_2$ and $H_1$ are close in mass. In practice, this signature can be observed in the cascade decay of the SM-like Higgs boson, $hto H_1 H_2to H_1 H_1 ell bar ell$ into two DM particles and di-leptons or $hto H_2 H_2to H_1 H_1 ell bar ell ell bar ell$ into two DM particles and four-leptons, where $h$ is produced from gluon-gluon Fusion. In order to test the feasibility of these channels at the LHC, we devise some benchmarks, compliant with collider, DM and cosmological data, for which the interplay between these production and decay modes is discussed. In particular, we show that the resulting detector signatures, $Et ell bar ell$ or $Et ell bar ell ell bar ell$, with the invariant mass of $ ell bar ell$ pairs much smaller than $m_Z$, can potentially be extracted already from Run 3 data and at the High-Luminosity phase of the LHC." @default.
- W4387561247 created "2023-10-12" @default.
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- W4387561247 date "2023-10-10" @default.
- W4387561247 modified "2023-10-13" @default.
- W4387561247 title "A smoking gun signature of the 3HDM" @default.
- W4387561247 doi "https://doi.org/10.48550/arxiv.2310.06593" @default.
- W4387561247 hasPublicationYear "2023" @default.
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