Twin Turtles

Asadi, Pouya; Craig, Nathaniel; Li, Ying Ying

doi:10.1007/jhep02(2019)138

Cited by 11 publications

(9 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Current and future measurements are expected to be sensitive to this signature, in particular through di-boson production at the HL-LHC [30,[38][39][40][41][42][43]. The MTH also admits a number of ultra-violet (UV) completions, including supersymmetric models [38,[44][45][46][47][48][49][50], holographic models [51], composite Higgs scenarios [34,[51][52][53], and extra-dimensional orbifold gauge theories [22,54]. Many of these models predict heavy, exotic states that carry both visible and twin sector quantum numbers that can be searched for at colliders [55][56][57].…”

Section: Jhep08(2021)009mentioning

confidence: 99%

Twin Higgs portal dark matter

Curtin

Gryba

2021

J. High Energ. Phys.

View full text Add to dashboard Cite

Many minimal models of dark matter (DM) or canonical solutions to the hierarchy problem are either excluded or severely constrained by LHC and direct detection null results. In particular, Higgs Portal Dark Matter (HPDM) features a scalar coupling to the Higgs via a quartic interaction, and obtaining the measured relic density via thermal freeze-out gives definite direct detection predictions which are now almost entirely excluded. The Twin Higgs solves the little hierarchy problem without coloured top partners by introducing a twin sector related to the Standard Model (SM) by a discrete symmetry. We generalize HPDM to arbitrary Twin Higgs models and introduce Twin Higgs Portal Dark Matter (THPDM), which features a DM candidate with an SU(4)-invariant quartic coupling to the Twin Higgs scalar sector. Given the size of quadratic corrections to the DM mass, its most motivated scale is near the mass of the radial mode. In that case, DM annihilation proceeds with the full Twin Higgs portal coupling, while direct detection is suppressed by the pNGB nature of the 125 GeV Higgs. For a standard cosmological history, this results in a predicted direct detection signal for THPDM that is orders of magnitude below that of HPDM with very little dependence on the precise details of the twin sector, evading current bounds but predicting possible signals at next generation experiments. In many Twin Higgs models, twin radiation contributions to ∆Neff are suppressed by an asymmetric reheating mechanism. We study this by extending the νMTH and X MTH models to include THPDM and compute the viable parameter space according to the latest CMB bounds. The injected entropy dilutes the DM abundance as well, resulting in additional suppression of direct detection below the neutrino floor.

show abstract

Section: Jhep08(2021)009mentioning

confidence: 99%

Twin Higgs portal dark matter

Curtin

Gryba

2021

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…It has been shown that the breaking of the discrete Z 2 symmetry can be realized spontaneously [19][20][21][22][23]. Ultraviolet completions have been constructed based on supersymmetry [24][25][26][27][28][29][30] (see also [31]), compositeness of the Higgs [32][33][34], and most recently using a "turtle" construction [35]. Composite MTH models have been shown to be consistent with precision electroweak constraints [36] and flavor bounds [37], and their collider signals studied [38,39].…”

Section: Introductionmentioning

confidence: 99%

Collider signals of the Mirror Twin Higgs boson through the hypercharge portal

et al. 2019

View full text Add to dashboard Cite

We consider the collider signals arising from kinetic mixing between the hypercharge gauge boson of the Standard Model and its twin counterpart in the Mirror Twin Higgs model, in the framework in which the twin photon is massive. Through the mixing, the Standard Model fermions acquire charges under the mirror photon and the mirror Z boson. We determine the current experimental bounds on this scenario, and show that the mixing can be large enough to discover both the twin photon and the twin Z at the LHC, or at a future 100 TeV hadron collider, with dilepton resonances being a particularly conspicuous signal. We show that, in simple models, measuring the masses of both the mirror photon and mirror Z, along with the corresponding event rates in the dilepton channel, overdetermines the system, and can be used to test these theories.

show abstract

“…The tthh measurements are expected to gain more at future hadron colliders, 1 Such a topology of resonant tthh is quite common in new physics. Another interesting example could be the twin Higgs with a "turtle" ultraviolet extension which was proposed recently [29]. In this context, the turtle structure can raise the scale of new colored particles to above the collider reach, in exchange for additional Higgs states which mix with the SM-like Higgs boson, making the tthh production to be one of the key probes for this turtle structure.…”

Section: Introductionmentioning

confidence: 99%

Anatomy of tthh physics at the HL-LHC

Liu

2020

Phys. Rev. D

Self Cite

View full text Add to dashboard Cite

The tthh production at colliders contains rich information on the nature of the Higgs boson. In this article, we systematically studied its physics at the high-luminosity Large Hadron Collider (HL-LHC), using exclusive channels with multiple (≥ 5) b-jets and one lepton (5b1l), multiple (≥ 5) b-jets and opposite-sign dilepton (5b2l), same-sign dilepton (SS2l), multiple leptons (multi-l), and ditau resonance (ττ). The scenarios analyzed include: (1) the tthh production in Standard Model; (2) the tthh production mediated by anomalous cubic Higgs self-coupling and tthh contact interaction; (3) heavy Higgs (H) production with ttH → tthh; and (4) pair production of fermionic top partners (T) with TT → tthh. To address the complication of event topologies and the mess of combinatorial backgrounds, a tool of boosted-decision-tree was applied in the analyses. The 5b1l and SS2l analyses define the two most promising channels. For the nonresonant tthh production, a combination of these exclusive analyses allows for its measurement in the SM with a statistical significance ∼0.9σ (with S=B > 1%), and may partially break the sensitivity degeneracy with respect to a varying cubic Higgs self-coupling, a difficulty usually thought to exist in gluon fusion di-Higgs analysis at HL-LHC. These sensitivities were also projected to future hadron colliders at 27 TeV and 100 TeV. For the resonant tthh productions, the heavy Higgs boson in type II two-Higgs-doublet-model could be efficiently searched for between the mass thresholds 2m h < m H < 2m t and even beyond that, for relatively small tan β (vacuum alignment), while the fermionic top partners in composite Higgs models could be probed up to ∼1.5 TeV and ∼1.7 TeV, for BrðT → thÞ ¼ 25% and 50%, respectively.

show abstract

Twin Turtles

Cited by 11 publications

References 35 publications

Twin Higgs portal dark matter

Twin Higgs portal dark matter

Collider signals of the Mirror Twin Higgs boson through the hypercharge portal

Anatomy of tthh physics at the HL-LHC

Contact Info

Product

Resources

About