The minimal linear σ model for the Goldstone Higgs

Feruglio, Ferruccio; Gavela, M.B.; Kanshin, K.; Machado, Pedro A. N.; Rigolin, S.; Saa, S.

doi:10.1007/jhep06(2016)038

Cited by 32 publications

(77 citation statements)

References 64 publications

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“…comprising, in its scalar sector L s , a linear sigma model which exhibits a global SO(5) symmetry broken to SO (4) and includes a new scalar, σ , singlet under the SM gauge group [15] …”

Section: Model-independent Analysismentioning

confidence: 99%

“…A complete renormalizable model was instead constructed in Refs. [14,15] (see also Refs. [9,16] for related results), which in its scalar part is a linear sigma model including a new singlet scalar σ .…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, in Ref. [15] the procedure and first steps to obtain the non-linear effective Lagrangian were developed. Later work has impact on interesting phenomenological consequences [17,18] and other aspects [19,20].…”

Section: Introductionmentioning

confidence: 99%

“…• In a second step, a concrete choice for the heavy-fermion representations will be considered [15]. This sector will be integrated out explicitly.…”

Section: Introductionmentioning

confidence: 99%

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The linear–non-linear frontier for the Goldstone Higgs

et al. 2016

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The minimal SO(5)/SO(4) σ -model is used as a template for the ultraviolet completion of scenarios in which the Higgs particle is a low-energy remnant of some highenergy dynamics, enjoying a (pseudo) Nambu-Goldstoneboson ancestry. Varying the σ mass allows one to sweep from the perturbative regime to the customary non-linear implementations. The low-energy benchmark effective non-linear Lagrangian for bosons and fermions is obtained, determining as well the operator coefficients including linear corrections. At first order in the latter, three effective bosonic operators emerge which are independent of the explicit soft breaking assumed. The Higgs couplings to vector bosons and fermions turn out to be quite universal: the linear corrections are proportional to the explicit symmetry-breaking parameters. Furthermore, we define an effective Yukawa operator which allows a simple parametrization and comparison of different heavy-fermion ultraviolet completions. In addition, one particular fermionic completion is explored in detail, obtaining the corresponding leading low-energy fermionic operators.

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“…comprising, in its scalar sector L s , a linear sigma model which exhibits a global SO(5) symmetry broken to SO (4) and includes a new scalar, σ , singlet under the SM gauge group [15] …”

Section: Model-independent Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…• In a second step, a concrete choice for the heavy-fermion representations will be considered [15]. This sector will be integrated out explicitly.…”

Section: Introductionmentioning

confidence: 99%

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The linear–non-linear frontier for the Goldstone Higgs

et al. 2016

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“…See [102] for a recent discussion of the σ, and [46,[103][104][105] for recent discussions of the dilaton. In the limit where is lighter than the other bound states, its coupling to SM vectors is dictated by eq.…”

Section: Jhep07(2016)101mentioning

confidence: 99%

The Higgs of the Higgs and the diphoton channel

Kannike

Pelaggi

Salvio

et al. 2016

J. High Energ. Phys.

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LHC results do not confirm conventional natural solutions to the Higgs mass hierarchy problem, motivating alternative interpretations where a hierarchically small weak scale is generated from a dimension-less quantum dynamics. We propose weakly and strongly-coupled models where the field that breaks classical scale invariance giving mass to itself and to the Higgs is identified with a possible new resonance within the LHC reach. As an example, we identify such resonance with the 750 GeV diphoton excess recently reported by ATLAS and CMS. Such models can be extrapolated up to the Planck scale, provide Dark Matter candidates and eliminate the SM vacuum instability.

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The global Higgs as a signal for compositeness at the LHC

Fichet¹,

Gersdorff

Pontón³

et al. 2017

J. High Energ. Phys.

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Abstract:The radial excitation of the global symmetry-breaking vacuum in composite Higgs models, called the "global Higgs", has been recently a focus of investigation. In this paper we study the prospects for detecting this composite scalar at the 13 TeV LHC. We compute the global Higgs production rates and estimate the discovery potential of a global Higgs decaying into top quark pairs and into Higgs and electroweak gauge bosons with subsequent hadronic decays. The global Higgs may also decay into fermion resonances such as top partners, providing a new window into compositeness. We show that top partner jets can be effectively unresolved in some regions of the parameter space. Such "boosted top partner" signatures would deserve the development of dedicated substructure analyses.

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The minimal linear σ model for the Goldstone Higgs

Cited by 32 publications

References 64 publications

The linear–non-linear frontier for the Goldstone Higgs

The linear–non-linear frontier for the Goldstone Higgs

The Higgs of the Higgs and the diphoton channel

The global Higgs as a signal for compositeness at the LHC

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