Heavy Higgs of the Twin Higgs models

Ahmed, Aqeel

doi:10.1007/jhep02(2018)048

Cited by 35 publications

(41 citation statements)

References 69 publications

(159 reference statements)

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“…This invariance implies that any tree-level coupling between the Ricci scalar (from which the radion arises) and the pseudo-Goldstone Higgs is forbidden. The size of such a term was estimated in [35,60] to be ∼ m 2 h /f 2 at one-loop, and assuming current bounds of f /v 3 [53,54] we determine that in a pseudo-Goldstone Higgs scenario this term is negligible and hence we neglect such mixing in this work.…”

Section: )mentioning

confidence: 99%

“…The phenomenology of such state is considered in Refs. [53,54]. 4 The cosmology of the mirror twin Higgs models introduces some problems which can be addressed either by additional Z2 breaking [55,56] or by completely decoupling the light states from the twin sector which do not contribute in alleviating the quadratic divergences of the SM Higgs [17].…”

Section: )mentioning

confidence: 99%

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Dilaton portal in strongly interacting twin Higgs models

Ahmed

Najjari

2020

J. High Energ. Phys.

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We consider a strongly interacting twin Higgs (SITH) model where an ultraviolet completion of twin Higgs mechanism is realized by a strongly coupled approximately scale invariant theory. Besides the Standard Model (SM) and twin sectors, the low energy effective theory contains a relatively light scalar called a dilaton -the pseudo Goldstone boson of spontaneously broken scale invariance. The dilaton provides a unique portal between the SM and twin sectors whose phenomenology could provide an important probe of the twin Higgs mechanism. As a concrete example, we consider a holographic twin Higgs model where the role of the dilaton is played by the radion. The phenomenology of this model is fully determined by a few parameters and our analysis concludes that at the HL-LHC (14 TeV) and HE-LHC (27 TeV) with 3000/fb most of the natural parameter space can be probed.

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confidence: 99%

Section: )mentioning

confidence: 99%

Dilaton portal in strongly interacting twin Higgs models

Ahmed

Najjari

2020

J. High Energ. Phys.

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“…the folded SUSY [23]. In this model, the squarks are charged under SU (3) B (but not the SM SU (3) C gauge group), and the EW gauge group For any scenario of the above mentioned models, the partial decay width of 0 ++ into a pair of SM particles is given by [29][30][31]:…”

Section: A a Higgs-portal Modelmentioning

confidence: 99%

Probing long-lived particles at Higgs factories

Cheung

Wang

2020

Phys. Rev. D

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We study displaced vertex signatures of long-lived particles (LLPs) from exotic Higgs decays in the context of a Higgs-portal model and a neutral-naturalness model at the CEPC and FCCee. Such two models feature two representative mass ranges for LLPs, which show very different behavior in their decay signatures. The Higgs-portal model contains a very light sub-GeV scalar boson stemming from a singlet scalar field appended to the Standard Model. Such a light scalar LLP decays into a pair of muons or pions, giving rise to a distinctive signature of collimated muonjet or pion-jet, thanks to the sub-GeV mass. On the other hand, the neutral-naturalness model, e.g., folded supersymmetry, predicts the lightest mirror glueball of mass O(10) GeV, giving rise to long decays with a large transverse impact parameter because of the relatively large mass. Utilizing such distinct characteristics to remove the background, we estimate the sensitivities of searches for light scalar bosons and mirror glueballs at the CEPC and FCC-ee. We find either complementary or stronger coverage compared to the previous results in the similar contexts.

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“…Δ v=f measures the tuning to obtain v < f via explicit soft Z 2 symmetry breaking, which is required by the Higgs coupling measurements [25], implying f ≳ 2.8v [26,27]. In our numerical analysis we fix f ¼ 3v.…”

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Asymptotically Free Natural Supersymmetric Twin Higgs Model

Badziak

Harigaya

2018

Phys. Rev. Lett.

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Twin Higgs (TH) models explain the absence of new colored particles responsible for natural electroweak symmetry breaking (EWSB). All known ultraviolet completions of TH models require some nonperturbative dynamics below the Planck scale. We propose a supersymmetric model in which the TH mechanism is introduced by a new asymptotically free gauge interaction. The model features natural EWSB for squarks and gluino heavier than 2 TeV even if supersymmetry breaking is mediated around the Planck scale, and has interesting flavor phenomenology including the top quark decay into the Higgs boson and the up quark which may be discovered at the LHC. DOI: 10.1103/PhysRevLett.120.211803 Introduction.-Models of natural electroweak symmetry breaking (EWSB), e.g., supersymmetric (SUSY) models [1][2][3][4] and composite Higgs models [5,6], generically predict new light colored particles, called top partners, so that the quantum correction to the Higgs mass is suppressed. Null results of the LHC searches, however, show that new colored particles are heavy, which calls for fine-tuning of the parameters of the theories; this is known as the little hierarchy problem. In light of this fact the idea that the light top partners are not charged under the standard model (SM) SUð3Þ c gauge group has become increasingly attractive. Twin Higgs (TH) models [7] are one of the most studied realizations of the idea.A crucial ingredient of TH models is an approximate global SUð4Þ symmetry under which the SM Higgs boson and its mirror (or twin) partner transform as a fundamental representation. The Higgs boson is a pseudo-NambuGoldstone boson associated with the spontaneous breakdown of the SUð4Þ symmetry. The SUð4Þ symmetry of the Higgs mass term emerges from a Z 2 symmetry exchanging the SM fields with their mirror counterparts. The light top partners are then charged under the mirror gauge group rather than the SM one. Standard lore says that ultraviolet (UV) completion of TH models involves some nonperturbative dynamics. This is because the quality of the SUð4Þ

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Heavy Higgs of the Twin Higgs models

Cited by 35 publications

References 69 publications

Dilaton portal in strongly interacting twin Higgs models

Dilaton portal in strongly interacting twin Higgs models

Probing long-lived particles at Higgs factories

Asymptotically Free Natural Supersymmetric Twin Higgs Model

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