BSM patterns in scalar-sector coupling modifiers

Englert, Christoph; Naskar, Wrishik; Sutherland, Dave

doi:10.1007/jhep11(2023)158

Cited by 6 publications

(2 citation statements)

References 117 publications

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“…For instance, assuming Minimal Composite Higgs Models [14,15], or in the Strongly Interacting Light Higgs Model [16], or in the SMEFT [17], where the Higgs field is a component inside a SU (2) doublet, one finds the following common correlation between the deviations of the a and b parameters 4 a = b. In contrast, assuming dilaton models [18] or in models with iso-singlet mixing [19,20] (see also references therein), one finds another correlation given by 2 a = b which is the consequence of having the particular relation between a and b given by a 2 = b in those models. Recently, the case of 2HDM has been studied in [21,22] and a new correlation has been obtained.…”

Section: Introductionmentioning

confidence: 99%

“…The accessibility to a = κ V and b = κ 2V within the HEFT via the total cross section of double Higgs production from WBF has been studied previously in the literature for both types of colliders, future e + e − colliders [17,20,23,24] like the International Linear Collider (ILC) and the Compact Linear Collider (CLIC) and also at pp colliders like the LHC and its future upgrades in luminosity and energy [20,25,26]. The reason to choose e + e − future planned colliders in the present paper is that these colliders are well known to offer a cleaner environment (i.e.…”

Section: Introductionmentioning

confidence: 99%

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Exploring correlations between HEFT Higgs couplings $$\kappa _V$$ and $$\kappa _{2V}$$ via HH production at $$e^+e^-$$ colliders

Dávila,

Domenech,

Herrero

et al. 2024

Eur. Phys. J. C

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In this work we explore the phenomenological implications at future $$e^+e^-$$ e + e - colliders of assuming anomalous couplings of the Higgs boson to gauge bosons HVV and HHVV$$(V=W,Z)$$ ( V = W , Z ) given by the $$\kappa $$ κ -modifiers with respect to the Standard Model couplings, $$\kappa _V$$ κ V and $$\kappa _{2V},$$ κ 2 V , respectively. For this study we use the Higgs Effective Field Theory (HEFT) where these two $$\kappa $$ κ parameters are identified with the two most relevant effective couplings at leading order, concretely $$a=\kappa _V$$ a = κ V and $$b=\kappa _{2V}.$$ b = κ 2 V . Our focus is put on these two couplings and their potential correlations which we believe carry interesting information on the underlying ultraviolet theory. The particular studied process is $$e^+e^- \rightarrow HH \nu \bar{\nu },$$ e + e - → H H ν ν ¯ , where the vector boson scattering subprocess $$WW \rightarrow HH$$ W W → H H plays a central role, specially at the largest planned energy colliders. Our detailed study of this process as a function of the energy and the angular variables indicates that the produced Higgs bosons in the BSM scenarios will have in general a high transversality as compared to the SM case if $$\kappa _V^2 \ne \kappa _{2V}.$$ κ V 2 ≠ κ 2 V . In order to enhance the sensitivity to these HEFT parameters $$\kappa _V$$ κ V and $$\kappa _{2V}$$ κ 2 V and their potential correlations we propose here some selected differential cross sections for the $$e^+e^- \rightarrow HH \nu \bar{\nu }$$ e + e - → H H ν ν ¯ process, where different kinematic properties of the BSM case with respect to the SM are manifested. Finally, we will focus on the dominant Higgs decays to $$b {\bar{b}}$$ b b ¯ pairs leading to final events with 4 b-jets and missing transverse energy from the undetected neutrinos and will provide the expected accessibility to the $$(\kappa _V,\kappa _{2V})$$ ( κ V , κ 2 V ) effective couplings and their potential correlations. In our study we will consider the three projected energies for $$e^+e^-$$ e + e - colliders of 500 GeV, 1000 GeV and 3000 GeV.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exploring correlations between HEFT Higgs couplings $$\kappa _V$$ and $$\kappa _{2V}$$ via HH production at $$e^+e^-$$ colliders

Dávila,

Domenech,

Herrero

et al. 2024

Eur. Phys. J. C

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Production of two, three, and four Higgs bosons: where SMEFT and HEFT depart

Delgado,

Gómez-Ambrosio,

Martínez-Martín

et al. 2024

J. High Energ. Phys.

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In this article we study the phenomenological implications of multiple Higgs boson production from longitudinal vector boson scattering in the context of effective field theories. We find compact representations for effective tree-level amplitudes with up to four final state Higgs bosons. Total cross sections are then computed for scenarios relevant at the LHC in which we find the general Higgs Effective Theory (HEFT) prediction avoids the heavy suppression observed in Standard Model Effective Field Theory (SMEFT).

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New physics implications of vector boson fusion searches exemplified through the Georgi-Machacek model

Chakraborti,

Das,

Ghosh

et al. 2024

Phys. Rev. D

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LHC searches for nonstandard scalars in vector boson fusion (VBF) production processes can be particularly efficient in probing scalars belonging to triplet or higher multiplet representations of the Standard Model SU(2)L gauge group. They can be especially relevant for models where the additional scalars do not have any tree level couplings to the Standard Model fermions, rendering VBF as their primary production mode at the LHC. In this work we employ the latest LHC data from VBF resonance searches to constrain the properties of nonstandard scalars, taking the Georgi-Machacek model as a prototypical example. We take into account the theoretical constraints on the potential from unitarity and boundedness from below as well as indirect constraints coming from the signal strength measurements of the 125 GeV Higgs boson at the LHC. To facilitate the phenomenological analysis we advocate a convenient reparametrization of the trilinear couplings in the scalar potential. We derive simple correlations among the model parameters corresponding to the decoupling limit of the model. We explicitly demonstrate how a combination of theoretical and phenomenological constraints can push the Georgi-Machacek model towards the decoupling limit. Our analysis suggests that the VBF searches can provide key insights into the composition of the electroweak vacuum expectation value. Published by the American Physical Society 2024

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BSM patterns in scalar-sector coupling modifiers

Cited by 6 publications

References 117 publications

Exploring correlations between HEFT Higgs couplings $$\kappa _V$$ and $$\kappa _{2V}$$ via HH production at $$e^+e^-$$ colliders

Exploring correlations between HEFT Higgs couplings $$\kappa _V$$ and $$\kappa _{2V}$$ via HH production at $$e^+e^-$$ colliders

Production of two, three, and four Higgs bosons: where SMEFT and HEFT depart

New physics implications of vector boson fusion searches exemplified through the Georgi-Machacek model

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