Neutrino masses from neutral top partners

Batell, Brian; McCullough, Matthew

doi:10.1103/physrevd.92.073018

Cited by 39 publications

(52 citation statements)

References 90 publications

(187 reference statements)

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“…In most familiar realizations of such a symmetry, such as supersymmetry [1,2] or Little Higgs models [3], the top partners are colored, and would therefore be produced at the Large Hadron Collider (LHC) with high rates. The absence of evidence for such particles has led to increasing interest in models based on the framework of Neutral Naturalness [4][5][6][7][8][9][10]. In this class of theories the top partners are not colored, thereby providing a natural explanation for their elusiveness.…”

Section: Introductionmentioning

confidence: 99%

Cosmology in Mirror Twin Higgs and neutrino masses

Chacko

Craig

Fox

et al. 2017

J. High Energ. Phys.

122

184

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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: Introductionmentioning

confidence: 99%

Cosmology in Mirror Twin Higgs and neutrino masses

Chacko

Craig

Fox

et al. 2017

J. High Energ. Phys.

122

184

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show abstract

“…(2) have been studied elsewhere [39,40]. Formally, GF is a finite next-to-next-to-leading order in QCD correction to the neutral current (NC) DY process…”

Section: Introductionmentioning

confidence: 99%

Fully automated precision predictions for heavy neutrino production mechanisms at hadron colliders

et al. 2016

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Motivated by TeV-scale neutrino mass models, we propose a systematic treatment of heavy neutrino (N ) production at hadron colliders. Our simple and efficient modeling of the vector boson fusion (VBF) W ± γ → N ℓ ± and N ℓ ± + nj signal definitions resolve collinear and soft divergences that have plagued past studies, and is applicable to other color-singlet processes, e.g., associated Higgs (W ± h), sparticle (l ±ν ℓ ), and charged Higgs (h ±± h ∓ ) production. We present, for the first time, a comparison of all leading N production modes, including both gluon fusion (GF)ν ℓ and VBF. We obtain fully differential results up to next-to-leading order (NLO) in QCD accuracy using a Monte Carlo tool chain linking FeynRules, NLOCT, and MadGraph5 aMC@NLO. Associated model files are publicly available. At the 14 TeV LHC, the leading order GF rate is small and comparable to the NLO N ℓ ± + 1j rate; at a future 100 TeV Very Large Hadron Collider, GF dominates for mN = 300 − 1500 GeV, beyond which VBF takes lead.

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“…One way to avoid this problem is neutral naturalness, the idea that partners are not charged under the SM groups. Perhaps the best example of this is Twin Higgs [2] (see [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] for related work). This model rests on a global SU(4) which is broken spontaneously to SU(3) at a scale f , leading to a set of Goldstone bosons.…”

Section: Introductionmentioning

confidence: 99%

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

Beauchesne

Earl

Gregoire

2016

J. High Energ. Phys.

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The Twin Higgs model seeks to address the little hierarchy problem by making the Higgs a pseudo-Goldstone of a global SU(4) symmetry that is spontaneously broken to SU(3). Gauge and Yukawa couplings, which explicitly break SU(4), enjoy a discrete Z 2 symmetry that accidentally maintains SU(4) at the quadratic level and therefore keeps the Higgs light. Contrary to most beyond the Standard Model theories, the quadratically divergent corrections to the Higgs mass are cancelled by a mirror sector, which is uncharged under the Standard Model groups. However, the Twin Higgs with an exact Z 2 symmetry leads to equal vevs in the Standard Model and mirror sectors, which is phenomenologically unviable. An explicit Z 2 breaking potential must then be introduced and tuned against the SU(4) breaking terms to produce a hierarchy of vevs between the two sectors. This leads to a moderate but non-negligible tuning. We propose a model to alleviate this tuning, without the need for an explicit Z 2 breaking sector. The model consists of two SU(4) fundamental Higgses, one whose vacuum preserves Z 2 and one whose vacuum breaks it. As the interactions between the two Higgses are turned on, the Z 2 breaking is transmitted from the broken to the unbroken sector and a small hierarchy of vevs is naturally produced. The presence of an effective tadpole and feedback between the two Higgses lead to a sizable improvement of the tuning. The resulting Higgs boson is naturally very Standard Model like.

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Neutrino masses from neutral top partners

Cited by 39 publications

References 90 publications

Cosmology in Mirror Twin Higgs and neutrino masses

Cosmology in Mirror Twin Higgs and neutrino masses

Fully automated precision predictions for heavy neutrino production mechanisms at hadron colliders

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

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