Large triple Higgs couplings in the 2HDM at $e^+e^-$ colliders

Arco, F.; Heinemeyer, S.; Herrero, M. J.

doi:10.48550/arxiv.2110.14424

Cited by 2 publications

(5 citation statements)

References 9 publications

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“…These triple Higgs couplings can have a very strong impact on the heavy di-Higgs production at pp and e + e − colliders [10][11][12]. As was discussed in these references, large coupling values can possibly facilitate the discovery of heavier 2HDM Higgs bosons.…”

Section: Discussionmentioning

confidence: 94%

“…The importance of the triple Higgs couplings in the production of the various (neutral) di-Higgs channels, hh, h H, H H and A A have already been studied for the types I and II and for the future e + e − linear colliders in Refs. [10][11][12], with encouraging results. We leave an extension of these collider studies to the complete picture of the four 2HDM Yukawa types for future work.…”

Section: Complete Picture Of Allowed Triple Higgs Couplingsmentioning

confidence: 95%

“…possibly enhanced production cross sections, can be expected due to large triple Higgs couplings (following the strategies discussed in Refs. [10][11][12]).…”

Section: Analysis Of the Triple Higgs Couplingsmentioning

confidence: 99%

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Triple Higgs couplings in the 2HDM: the complete picture

2022

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The measurement of the triple Higgs coupling is one of the main tasks of the (HL-)LHC and future lepton colliders. Similarly, triple Higgs couplings involving BSM Higgs bosons are of high interest. Within the framework of Two Higgs Doublet Models (2HDM) we investigate the allowed ranges for all triple Higgs couplings involving at least one light, SM-like Higgs boson. We present newly the allowed ranges for 2HDM type III and IV and update the results within the type I and II. We take into account theoretical constraints from unitarity and stability, experimental constraints from direct BSM Higgs-boson searches, measurements of the rates of the SM-like Higgs-boson at the LHC, as well as flavor observables and electroweak precision data. For the SM-type triple Higgs coupling w.r.t. its SM value, $$\lambda _{hhh}/\lambda _{\mathrm{SM}}$$ λ hhh / λ SM , we find allowed intervals of $$\sim [{-0.5}, {1.3}]$$ ∼ [ - 0.5 , 1.3 ] in type I and $$\sim [{0.5}, {1.0}]$$ ∼ [ 0.5 , 1.0 ] in the other Yukawa types. These allowed ranges have important implications for the experimental determination of this coupling at future collider experiments. We find the coupling $$\lambda _{hhH}$$ λ hhH between $$\sim -1.5$$ ∼ - 1.5 and $$\sim +1.5$$ ∼ + 1.5 in the four Yukawa types. For the triple Higgs couplings involving two heavy neutral Higgs bosons, $$\lambda _{hHH}$$ λ hHH and $$\lambda _{hAA}$$ λ hAA we find values between $$\sim -0.5$$ ∼ - 0.5 and $$\sim 16$$ ∼ 16 , and between $$\sim -1$$ ∼ - 1 and $$\sim 32$$ ∼ 32 for $$\lambda _{hH^+H^-}$$ λ h H + H - . These potentially large values could lead to strongly enhanced production of two Higgs-bosons at the HL-LHC or high-energy lepton colliders.

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Section: Discussionmentioning

confidence: 94%

Section: Complete Picture Of Allowed Triple Higgs Couplingsmentioning

confidence: 95%

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Triple Higgs couplings in the 2HDM: the complete picture

2022

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“…The importance of the triple Higgs couplings in the production of the various (neutral) di-Higgs channels, hh, hH, HH and AA have already been studied for the types I and II and for the future e + e − linear colliders in Refs. [10][11][12], with encouraging results. We leave an extension of these collider studies to the complete picture of the four 2HDM Yukawa types for future work.…”

Section: Complete Picture Of Allowed Triple Higgs Couplingsmentioning

confidence: 95%

“…[10] (extended discussions can be found in Refs. [11,12]). Specifically, in these previous works we explored the sensitivity to BSM triple Higgs couplings via the double Higgs production channels e + e − → h i h j ν ν where details of the experimental constraints have been updated.…”

Section: Introductionmentioning

confidence: 99%

Triple Higgs Couplings in the 2HDM: The Complete Picture

Arco,

Heinemeyer,

Herrero

2022

Preprint

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The measurement of the triple Higgs coupling is one of the main tasks of the (HL-)LHC and future lepton colliders. Similarly, triple Higgs couplings involving BSM Higgs bosons are of high interest. Within the framework of Two Higgs Doublet Models (2HDM) we investigate the allowed ranges for all triple Higgs couplings involving at least one light, SM-like Higgs boson. We present newly the allowed ranges for 2HDM type III and IV and update the results within the type I and II. We take into account theoretical constraints from unitarity and stability, experimental constraints from direct BSM Higgs-boson searches, measurements of the rates of the SM-like Higgs-boson at the LHC, as well as flavor observables and electroweak precision data. For the SMtype triple Higgs coupling w.r.t. its SM value, λ hhh /λ SM , we find allowed intervals of ∼ [−0.5, 1.3] in type I and ∼ [0.5, 1.0] in the other Yukawa types. These allowed ranges have important implications for the experimental determination of this coupling at future collider experiments. We find the coupling λ hhH between ∼ −1.5 and ∼ +1.5 in the four Yukawa types. For the triple Higgs couplings involving two heavy neutral Higgs bosons, λ hHH and λ hAA we find values between ∼ −0.5 and ∼ 16, and between ∼ −1 and ∼ 32 for λ hH + H − . These potentially large values could lead to strongly enhanced production of two Higgs-bosons at the HL-LHC or high-energy lepton colliders.

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Large triple Higgs couplings in the 2HDM at $e^+e^-$ colliders

Cited by 2 publications

References 9 publications

Triple Higgs couplings in the 2HDM: the complete picture

Triple Higgs couplings in the 2HDM: the complete picture

Triple Higgs Couplings in the 2HDM: The Complete Picture

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