The scale of new physics from the Higgs couplings to gg

Abu-Ajamieh, Fayez

doi:10.1016/j.physletb.2022.137389

Cited by 5 publications

(15 citation statements)

References 14 publications

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“…Non-minimal di-Higgs couplings are interesting, as they have unique signatures, and can be probed by future colliders, especially the muon collider. A non-minimal di-Higgs coupling could even explain the discrepancy of the muon g − 2 anomaly [18]. In studying these couplings in the present work, we find it suitable to follow the framework proposed in [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 74%

“…A non-minimal di-Higgs coupling could even explain the discrepancy of the muon g − 2 anomaly [18]. In studying these couplings in the present work, we find it suitable to follow the framework proposed in [19][20][21][22][23]. We call this framework the Weak Scale Deviations framework (WSD).…”

Section: Introductionmentioning

confidence: 88%

“…We begin by introducing our FV framework, which is essentially based on the phenomenological bottom-up WSD approach introduced in [19][20][21][22][23], generalized to the case of FV couplings and Wilson coefficients. In this framework, we avoid power expansion in writing down higher-dimensional operators, as the case in the SMEFT.…”

Section: Frameworkmentioning

confidence: 99%

“…We will present the matching to the SMEFT in Section V below and show the corresponding scale of new physics. The interested reader is instructed to refer to [20][21][22][23] for more details on mapping the operators into the SMEFT and the HEFT.…”

Section: Frameworkmentioning

confidence: 99%

“…Notice that the FV case corresponds to l = e, τ . These diagrams can be evaluated using the same techniques illustrated in the appendices and in [18], and they are found to provide the following contribution to (g − 2)…”

Section: Thus the Leading Contribution Arises At 2-loopsmentioning

confidence: 99%

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The scale of new physics from the Higgs couplings to γγ and γZ

Abu-Ajamieh

2022

J. High Energ. Phys.

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Measuring the Higgs couplings accurately at colliders is one of the best routes for finding physics Beyond the Standard Model (BSM). If the measured couplings deviate from the SM predictions, then this would give rise to energy-growing processes that violate tree-level unitarity at some energy scale, indicating new physics. In this paper, we extend previous work on unitarity bounds from the Higgs potential and the Higgs couplings to vector bosons and the top quark; to the Higgs couplings to γγ and γZ. We find that while the HL-LHC might be able to find new physics in the γZ sector, the scale of new physics in both sectors is mostly beyond its reach. However, accurate measurements of the leading couplings of the two sectors in the HL-LHC can place stringent limits on both the scale of new physics and on other Higgs couplings that are difficult to measure. In addition, the scale of new physics is mostly within the reach of the 100 TeV collider.

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Section: Introductionmentioning

confidence: 74%

Section: Introductionmentioning

confidence: 88%

Section: Frameworkmentioning

confidence: 99%

Section: Frameworkmentioning

confidence: 99%

Section: Thus the Leading Contribution Arises At 2-loopsmentioning

confidence: 99%

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The scale of new physics from the Higgs couplings to γγ and γZ

Abu-Ajamieh

2022

J. High Energ. Phys.

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Primary observables for indirect searches at colliders

Chang

Miranda

Liu

et al. 2023

J. High Energ. Phys.

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We consider the complete set of observables for collider searches for indirect effects of new heavy physics. They consist of SU(3)C × U(1)EM invariant interaction terms/operators that parameterize deviations from the Standard Model. We show that, under very general assumptions, the leading deviations from the Standard Model are given by a finite number of ‘primary’ operators, with the remaining operators given by ‘Mandelstam descendants’ whose effects are suppressed by powers of Mandelstam variables divided by the mass scale M of the heavy physics. We explicitly determine all 3 and 4-point primary operators relevant for Higgs signals at colliders by using the correspondence between on-shell amplitudes and independent operators. We give a detailed discussion of the methods used to obtain this result, including a new analytical method for determining the independent operators. The results are checked using the Hilbert series that counts independent operators. We also give a rough sketch of the phenomenology, including unitarity bounds on the interaction strengths and rough estimates of their importance for Higgs decays at the HL-LHC. These results motivate further exploration of Higgs decays to $$ Z\overline{f}f $$ Z f ¯ f , $$ W\overline{f}{f}^{\prime } $$ W f ¯ f ′ , $$ \gamma \overline{f}f $$ γ f ¯ f , and Zγγ.

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