Multi-Higgs boson probes of the dark sector

Flores, Marvin; Groß, Christian; Kim, Jong Soo; Lebedev, O. V.; Mondal, Subhadeep

doi:10.1103/physrevd.102.015004

Cited by 6 publications

(3 citation statements)

References 59 publications

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“…Some of them allow for very efficient DM annihilation even at tiny θ [256], which we discuss in the next section. Regarding collider physics, larger non-Abelian sectors generally entail more complicated cascade decays, including those with multi-Higgs final states and missing E T [257]. For example, the processes…”

Section: Phenomenology Of Vector Dark Mattermentioning

confidence: 99%

“…At the HL-LHC, the two Higgs mode can be studied with the help of the Boosted Decision Trees technique. For h 1 's decaying to bb + γγ and bb + W W , the model can be probed in the regime m hn m A with m hn 600 GeV and substantial sin θ ∼ 0.3 [257]. For a fully hadronic h 1 decay, h 1 h 1 → bb bb, and heavy h n , one may use jet substructure analysis to probe m hn up to 1 TeV or so [258].…”

Section: Phenomenology Of Vector Dark Mattermentioning

confidence: 99%

“…For a fully hadronic h 1 decay, h 1 h 1 → bb bb, and heavy h n , one may use jet substructure analysis to probe m hn up to 1 TeV or so [258]. The three Higgs final state, on the other hand, is likely to be of little relevance at the LHC [257].…”

Section: Phenomenology Of Vector Dark Mattermentioning

confidence: 99%

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The Higgs Portal to Cosmology

Lebedev

2021

Preprint

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The discovery of the Higgs boson has opened a new avenue for exploring physics beyond the Standard Model. In this review, we discuss cosmological aspects of the simplest Higgs couplings to the hidden sector, known as the Higgs portal. We focus on implications of such couplings for inflation, vacuum stability and dark matter, with the latter including both the traditional weakly interacting massive particles as well as feebly interacting scalars. The cosmological impact of the Higgs portal can be important even for tiny values of the couplings.

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Section: Phenomenology Of Vector Dark Mattermentioning

confidence: 99%

Section: Phenomenology Of Vector Dark Mattermentioning

confidence: 99%

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The Higgs Portal to Cosmology

Lebedev

2021

Preprint

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Novel collider signatures in the type-I 2HDM+a model

Argyropoulos,

Haisch,

Kalaitzidou

2024

J. High Energ. Phys.

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The 2HDM+a model is one of the main models used in the interpretations of dark matter searches at the LHC. So far, all the 2HDM+a benchmarks considered by the ATLAS and CMS experiments are limited to a type-II Yukawa sector, in which the Higgs bosons A, H, and H± are all constrained to be mass-degenerate and heavier than around 600 GeV. In this work, we present the first detailed study of 2HDM+a models with a type-I Yukawa sector, which, for moderate values of tan β, lift the constraints from flavour physics, allowing the extra Higgs bosons to be even lighter than the 125 GeV Higgs boson discovered at the LHC. We discuss several benchmarks where the A, H, and H± states are not necessarily mass-degenerate and the signatures that arise in these models, some of which have not yet been explored at the LHC. We present the dominant channels in the studied benchmarks and the expected sensitivity in Run 2 data using truth-level analyses and discuss potential improvements in the experimental searches for Run 3.

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Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques

Adhikary

Barman

Bhattacherjee

2020

J. High Energ. Phys.

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The prospects of observing the non-resonant di-Higgs production in the Standard Model at the proposed high energy upgrade of the LHC, viz. the HE-LHC ($$ \sqrt{s} $$ s = 27 TeV and ℒ = 15 ab−1) is studied. Various di-Higgs final states are considered based on their cleanliness and production rates. The search for the non-resonant double Higgs production at the HE-LHC is performed in the $$ b\overline{b}\gamma \gamma $$ b b ¯ γγ , $$ b\overline{b}{\tau}^{+}{\tau}^{-} $$ b b ¯ τ + τ − , $$ b\overline{b}{WW}^{\ast } $$ b b ¯ WW ∗ , WW∗γγ, $$ b\overline{b}{ZZ}^{\ast } $$ b b ¯ ZZ ∗ and $$ b\overline{b}{\mu}^{+}{\mu}^{-} $$ b b ¯ μ + μ − channels. The signal-background discrimination is performed through multivariate analyses using the Boosted Decision Tree Decorrelated (BDTD) algorithm in the TMVA framework, the XGBoost toolkit and Deep Neural Network (DNN). The variation in the kinematics of Higgs pair production as a function of the self-coupling of the Higgs boson, λh, is also studied. The ramifications of varying λh on the $$ b\overline{b}\gamma \gamma $$ b b ¯ γγ , $$ b\overline{b}{\tau}^{+}{\tau}^{-} $$ b b ¯ τ + τ − and $$ b\overline{b}{WW}^{\ast } $$ b b ¯ WW ∗ search analyses optimized for the SM hypothesis is also explored.

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Multi-Higgs boson probes of the dark sector

Cited by 6 publications

References 59 publications

The Higgs Portal to Cosmology

The Higgs Portal to Cosmology

Novel collider signatures in the type-I 2HDM+a model

Prospects of non-resonant di-Higgs searches and Higgs boson self-coupling measurement at the HE-LHC using machine learning techniques

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