The spontaneous ℤ 2 $$ {\mathbb{Z}}_2 $$ breaking Twin Higgs

Beauchesne, Hugues; Earl, Kevin; Gregoire, Thomas

doi:10.1007/jhep01(2016)130

Cited by 48 publications

(60 citation statements)

References 45 publications

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“…Flavor constraints on the Holograpic and composite Twin Higgs have recently been presented finding reduced tension as compared to regular composite Higgs models [20]. Various options for the breaking of Z 2 and the way they affect the tuning of the model have also been investigated [21][22][23][24].…”

Section: Jhep07(2017)023mentioning

confidence: 99%

Cosmology in Mirror Twin Higgs and neutrino masses

Chacko

Craig

Fox

et al. 2017

J. High Energ. Phys.

115

183

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We explore a simple solution to the cosmological challenges of the original Mirror Twin Higgs (MTH) model that leads to interesting implications for experiment. We consider theories in which both the standard model and mirror neutrinos acquire masses through the familiar seesaw mechanism, but with a low right-handed neutrino mass scale of order a few GeV. In these νMTH models, the right-handed neutrinos leave the thermal bath while still relativistic. As the universe expands, these particles eventually become nonrelativistic, and come to dominate the energy density of the universe before decaying. Decays to standard model states are preferred, with the result that the visible sector is left at a higher temperature than the twin sector. Consequently the contribution of the twin sector to the radiation density in the early universe is suppressed, allowing the current bounds on this scenario to be satisfied. However, the energy density in twin radiation remains large enough to be discovered in future cosmic microwave background experiments. In addition, the twin neutrinos are significantly heavier than their standard model counterparts, resulting in a sizable contribution to the overall mass density in neutrinos that can be detected in upcoming experiments designed to probe the large scale structure of the universe.

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Section: Jhep07(2017)023mentioning

confidence: 99%

Cosmology in Mirror Twin Higgs and neutrino masses

Chacko

Craig

Fox

et al. 2017

J. High Energ. Phys.

115

183

View full text Add to dashboard Cite

show abstract

“…This possibility does not lead to a viable phenomenology in our setup and we will not discuss it further (see however ref. [22]). Instead, if κ is larger than zero, the Z 2 symmetry is preserved by the vacuum, and H A and H B get equal VEVs v A = v B = f / √ 2.…”

Section: Jhep01(2017)142mentioning

confidence: 99%

SUSY meets her twin

Katz

Mariotti

Pokorski

et al. 2017

J. High Energ. Phys.

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We investigate the general structure of mirror symmetry breaking in the Twin Higgs scenario. We show, using the IR effective theory, that a significant gain in fine tuning can be achieved if the symmetry is broken hardly. We emphasize that weakly coupled UV completions can naturally accommodate this scenario. We analyze SUSY UV completions and present a simple Twin SUSY model with a tuning of around 10% and colored superpartners as heavy as 2 TeV. The collider signatures of general Twin SUSY models are discussed with a focus on the extended Higgs sectors.

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“…We can approximate the amount of fine tuning needed to put the vevs in this hierarchical structure as [10,33]…”

Section: A Mirror Setupmentioning

confidence: 99%

Flavorful two-Higgs-doublet models with a twist

Altmannshofer

Maddock

2018

Phys. Rev. D

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A two Higgs doublet model with flavorful Yukawa structure, in which the two doublets give mass to the third and the first two generations respectively, is combined with the twin Higgs mechanism to stabilize the Higgs mass against radiative corrections. We consider both a mirror twin and fraternal twin setup. We identify Higgs signal strength measurements and the decay B s → µµ as the most important indirect constraints on the parameter space of the model. We explore the collider phenomenology of the model and find that the heavy Higgs in the visible sector can give a sizable number of displaced decays into b-jets in regions of parameter space where the SM-like Higgs and the twin Higgs do not provide any striking signatures. I. INTRODUCTIONThe absence of clear evidence for new degrees of freedom at the electroweak scale from the Large Hadron Collider (LHC) challenges "traditional" solutions to the hierarchy problem that predict new colored degrees of freedom at the TeV scale. One elegant way to address the hierarchy problem that largely avoids constraints from direct searches at the LHC, is the twin Higgs mechanism [1] and its variations [2,3]. In the twin Higgs model the SM Higgs exists as part of an enlarged, approximately SU (4) symmetric, scalar sector. The symmetry is broken resulting in Higgs doublets both in the visible sector and in an additional "twin" sector. The original twin Higgs model prescribed a mirror symmetry, resulting in an exact copy of the SM in the twin sector (see e.g. also [4,5]). The twin fermions are not charged under the SM gauge symmetries and therefore very hard to search for experimentally. The

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The spontaneous ℤ 2 $$ {\mathbb{Z}}_2 $$ breaking Twin Higgs

Cited by 48 publications

References 45 publications

Cosmology in Mirror Twin Higgs and neutrino masses

Cosmology in Mirror Twin Higgs and neutrino masses

SUSY meets her twin

Flavorful two-Higgs-doublet models with a twist

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