Quartic Gauge-Higgs couplings: constraints and future directions

Anisha, Anisha; Atkinson, Oliver; Bhardwaj, Akanksha; Englert, Christoph; Stylianou, Panagiotis

doi:10.1007/jhep10(2022)172

Cited by 15 publications

(4 citation statements)

References 111 publications

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“…This is vastly different for κ 2V ̸ = 1, which breaks electroweak gauge invariance in the SM(EFT), leading to a breakdown of renormalisability. As κ 2V is related to a modification of the gauge sector, a departure from κ 2V = 1 requires care when moving beyond tree-level considerations [15]. Notwithstanding these theoretical obstacles, the gauge-Higgs quartic interactions can be strong indicators of Higgs compositeness as a consequence of dynamical vacuum misalignment.…”

Section: Jhep11(2023)158mentioning

confidence: 99%

“…In the Higgs effective field theory, the leading-order operators that modify κ V , κ 2V , and κ λ (free, uncorrelated parameters in HEFT) not only run into each other, but also into higher derivative, next-to-leading-order operators that modify the measured κs, as shown in table 1. To encapsulate these effects, we define an effective κ V from the coefficient of g µν in the effective vertex for hW W (as defined in [15,101])…”

Section: Running Of Coupling Modifiersmentioning

confidence: 99%

“…Using the results of [101,102] (see also [15,[103][104][105][106][107]), the couplings run according to…”

Section: Running Of Coupling Modifiersmentioning

confidence: 99%

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BSM patterns in scalar-sector coupling modifiers

Englert,

Naskar,

Sutherland

2023

J. High Energ. Phys.

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We consider what multiple Higgs interactions may yet reveal about the scalar sector. We estimate the sensitivity of a Feynman topology-templated analysis of weak boson fusion Higgs pair production at present and future colliders — where the signal is a function of the Higgs coupling modifiers κV, κ2V, and κλ. While measurements are statistically limited at the LHC, they are under general perturbative control at present and future colliders, departures from the SM expectation give rise to a significant future potential for BSM discrimination in κ2V. We explore the landscape of BSM models in the space of deviations in κV, κ2V, and κλ, highlighting models that have measurable order-of-magnitude enhancements in either κ2V or κλ, relative to their deviation in the single Higgs coupling κV.

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Section: Jhep11(2023)158mentioning

confidence: 99%

Section: Running Of Coupling Modifiersmentioning

confidence: 99%

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BSM patterns in scalar-sector coupling modifiers

Englert,

Naskar,

Sutherland

2023

J. High Energ. Phys.

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“…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%

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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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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Quartic Gauge-Higgs couplings: constraints and future directions

Cited by 15 publications

References 111 publications

BSM patterns in scalar-sector coupling modifiers

BSM patterns in scalar-sector coupling modifiers

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

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