Introduction

Panico, Giuliano; Wulzer, Andrea

doi:10.1007/978-3-319-22617-0_1

Cited by 176 publications

(57 citation statements)

References 28 publications

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“…Following the formalism introduced in Sect. 2 we find that 10,20). The same conclusions of no restrictions to our model can also be drawn for the remaining decay channels from which the experimental upper bounds for the production cross section times the branching ratio are available.…”

Section: Unitarity Limits For the Preferred Values Of The Higgs Couplsupporting

confidence: 74%

“…Independently of this restriction, if we narrowed our considerations to the tBESS interaction pattern of the vector resonance to fermions the low-energy limit from the EW precision measurements reads g ≥ 12 at 95% CL [35]. This is an additional motivation for considering g values above 10.…”

Section: Unitarity Limits For the Preferred Values Of The Higgs Couplmentioning

confidence: 99%

“…In the strongly coupled scenario, the observed lightness of the Higgs boson with respect to the expected size of the compositeness scale (naively, = 4πv 3 TeV) could be explained if the Higgs boson were a (pseudo)NambuGoldstone boson after a breakdown of suitable extended global symmetry [3][4][5][6][7][8][9][10]. Another widely studied possibility is to embed the composite Higgs in an effective SU (2) doublet [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] where its lightness would be guaranteed by the theory's particularities.…”

Section: Introductionmentioning

confidence: 99%

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The limits on the strong Higgs sector parameters in the presence of new vector resonances

Gintner

Juran

2016

Eur. Phys. J. C

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In this paper, we investigate how the LHC data limit the Higgs-related couplings in the effective description of a strongly interacting extension of the Standard model. The Higgs boson is introduced as a scalar composite state and it is followed in the mass hierarchy by an SU (2) triplet of vector composites. The limits are calculated from the constraints obtained in the recent ATLAS+CMS combined analysis of the data from 2011 and 2012. We find that the data prefer the scenario where the Higgs couplings to the electroweak gauge bosons differ from its couplings to the vector triplet. We also investigate the unitarity limits of the studied effective model for the experimentally preferred values of the Higgs couplings. We find from the ππ → ππ scattering amplitudes that for the vector resonance masses between one and two TeV significant portions of the experimentally allowed regions are well below the unitarity limit. We also evaluate how the existing ATLAS and CMS Run-2 data restrict our model with the upper bounds on the resonance production cross section times its branching ratio for various decay channels. The masses in the range 1 TeV ≤ M ρ ≤ 2 TeV are not excluded in parts or even full parameter space of our theory.

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Section: Unitarity Limits For the Preferred Values Of The Higgs Couplsupporting

confidence: 74%

Section: Unitarity Limits For the Preferred Values Of The Higgs Couplmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The limits on the strong Higgs sector parameters in the presence of new vector resonances

Gintner

Juran

2016

Eur. Phys. J. C

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“…The NNLO CT14 PDF set [111] in the 4 flavor scheme has been employed 10 . The SM 10 Here again the 3rd family PDF, including the top-quark, may play an important role at 100 TeV. This would lead to a process with 2 b-jets in the final state, allowing for a b-tagging on the parameters used are: α EW = 1/127.9, M Z = 91.18 GeV, G F = 1.16639 × 10 −5 GeV and α S (M Z ) = 0.118.…”

Section: A Vector Phenomenologymentioning

confidence: 99%

Implications of vector boson scattering unitarity in composite Higgs models

Franzosi

Ferrarese

2017

Phys. Rev. D

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The strong nature of Composite Higgs models manifests at high energies through the growing behavior of the scattering amplitudes of longitudinally polarized weak bosons that leads to the formation of composite resonances as well as non-resonant strong effects. In this work the unitarity of these scattering amplitudes is used as a tool to assess the profile of the composite spectrum of the theory, including non-resonant enhancements, vector resonances and the CP-even scalar excitation. These three signatures are then studied in realistic scattering processes at hadron colliders, aiming to estimate the potential to exclude dynamically motivated scenarios of Composite Higgs models.

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“…Ref. [27]). Notice that, for the cases with a single Yukawa operator, the global coefficients and suppression scales in Eqs.…”

Section: -14 3yomentioning

confidence: 99%

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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Introduction

Cited by 176 publications

References 28 publications

The limits on the strong Higgs sector parameters in the presence of new vector resonances

The limits on the strong Higgs sector parameters in the presence of new vector resonances

Implications of vector boson scattering unitarity in composite Higgs models

The linear–non-linear frontier for the Goldstone Higgs

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