Fine tuning in one-higgs and two-higgs standard models

Andrianov, Alexander A.; Rodenberg, R.; Romanenko, N.

doi:10.1007/bf02816853

Cited by 9 publications

(7 citation statements)

References 15 publications

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“…For renormalization group studies, especially the role of Higgs self-couplings is crucial and has been studied in the literature, in the SM (see for instance [7,40]) as well as in the 2HDM [5,[41][42][43][44][45][46][47], because these quartic couplings tend to destabilize the Higgs potential at some µ high . Since a break-down of stability would mean that our theory would lose validity beyond a certain scale, we want to impose a stable Higgs potential beyond µ ew as a constraint on all couplings.…”

Section: Jhep11(2015)052mentioning

confidence: 99%

“…If µ nat is large enough, the logarithmic factor might compensate for the loop suppression, and the power series of the higher order corrections no longer converges. So requiring the cancellation of the first order Higgs mass correction -like often applied in the literature [42,52,53,57] -is not sufficient if we do not know about the higher order terms. Only if we assume perturbativity of the power series, we can make a valid statement about whether the Higgs mass at the electroweak scale can be natural in the 2HDM or at least whether the hierarchy problem can be mitigated.…”

Section: Jhep11(2015)052mentioning

confidence: 99%

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Global fits of the two-loop renormalized Two-Higgs-Doublet model with soft Z 2 breaking

Chowdhury

Eberhardt

2015

J. High Energ. Phys.

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Abstract:We determine the next-to-leading order renormalization group equations for the Two-Higgs-Doublet model with a softly broken Z 2 symmetry and CP conservation in the scalar potential. We use them to identify the parameter regions which are stable up to the Planck scale and find that in this case the quartic couplings of the Higgs potential cannot be larger than 1 in magnitude and that the absolute values of the S-matrix eigenvalues cannot exceed 2.5 at the electroweak symmetry breaking scale. Interpreting the 125 GeV resonance as the light CP -even Higgs eigenstate, we combine stability constraints, electroweak precision and flavour observables with the latest ATLAS and CMS data on Higgs signal strengths and heavy Higgs searches in global parameter fits to all four types of Z 2 symmetry. We quantify the maximal deviations from the alignment limit and find that in type II and Y the mass of the heavy CP -even (CP -odd) scalar cannot be smaller than 340 GeV (360 GeV). Also, we pinpoint the physical parameter regions compatible with a stable scalar potential up to the Planck scale. Motivated by the question how natural a Higgs mass of 125 GeV can be in the context of a Two-Higgs-Doublet model, we also address the hierarchy problem and find that the Two-Higgs-Doublet model does not offer a perturbative solution to it beyond 5 TeV.

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Section: Jhep11(2015)052mentioning

confidence: 99%

Section: Jhep11(2015)052mentioning

confidence: 99%

Global fits of the two-loop renormalized Two-Higgs-Doublet model with soft Z 2 breaking

Chowdhury

Eberhardt

2015

J. High Energ. Phys.

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“…This requirement involves a severe fine-tuning (as with a scalar field [31][32][33][34], Stueckelberg vector [35] and spacetime curvature [36,37]) and cannot form a viable stabilization mechanism.…”

Section: Spin-3/2 Field In Loopsmentioning

confidence: 99%

Hidden spin-3/2 field in the standard model

et al. 2017

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Here we show that a massive spin-3/2 field can hide in the SM spectrum in a way revealing itself only virtually. We study collider signatures and loop effects of this field, and determine its role in Higgs inflation and its potential as dark matter. We show that this spin-3/2 field has a rich linear collider phenomenology and motivates consideration of a neutrino-Higgs collider. We also show that the study of Higgs inflation, dark matter and dark energy can reveal more about the neutrino and dark sector.

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“…A dimensão extra desse modelo é compactificada num círculo S 1 (figura 3.1a) e tem tamanho R, onde R −1 deve ser da ordem de TeV para evitar o fine-tuning [49] dos parâmetros do setor de Higgs sendo, portanto, experimentalmente acessível aos aceleradores atuais. O Modelo de MUED possui então três parâmetros livres: R, Λ e a massa do bóson de Higgs, m h .…”

Section: Decomposição Dos Modos De Kaluza-kleinunclassified

Procura de Sinais de Dimensões Extras Universais em Colisões Próton-Antipróton

Santos¹

2012

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Models that predict the existence of extra spatial dimensions have been studied since the beginning of the 20th century. These models can incorporate gravity in the framework that describes the other interactions and they can present a number of interesting features such as a dark matter candidate. In this work, we explore the consequences of the Universal Extra Dimensions (UED) model by searching for the production of Kaluza-Klein particles whose decay chain leads to signature µ ± µ ± + jets + E T /. We employ the data set corresponding to an integrated luminosity of 7.3 fb −1 , collected by the DØ detector at a pp collider at a center of mass energy of 1.96 TeV. Since no excess was observed in the data, we were able to set a lower limit on the compactification scale of R −1 > 260 GeV in the model. This is the first study to impose a direct limit on the minimal UED model. vi 6 Sinal de UED: Seleção de Eventos e Modelamento do Background 6.

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Fine tuning in one-higgs and two-higgs standard models

Cited by 9 publications

References 15 publications

Global fits of the two-loop renormalized Two-Higgs-Doublet model with soft Z 2 breaking

Global fits of the two-loop renormalized Two-Higgs-Doublet model with soft Z 2 breaking

Hidden spin-3/2 field in the standard model

Procura de Sinais de Dimensões Extras Universais em Colisões Próton-Antipróton

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