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

Chacko, Zackaria; Kılıç, Can; Najjari, Saereh; Verhaaren, Christopher B.

doi:10.1103/physrevd.100.035037

Cited by 15 publications

(20 citation statements)

References 155 publications

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“…15 Let us focus therefore on the lightest twin quarkonium bound states with = 0, which are a pseudoscalar η −+ and a vector Υ −− , both electrically neutral (see also [47,48]). 16 Their mass is given to a good approximation by m η,Υ ≈ 2mq, while their decay rates can be found e.g. in [49][50][51].…”

Section: Hypercharged Quirksmentioning

confidence: 98%

“…One instance, perhaps not the best but certainly simple, is to consider a f -independent mass for the twin top m ttRtL , 9 A coefficient c y < 0 implies that the contribution from Eq. (16) to α in the Higgs potential is also negative, assuming the perturbative result that the parameter A in the RGE of ∆y 2 L , Eq. (17), is positive.…”

Section: Twin Pseudo-ngbsmentioning

confidence: 99%

“…If this were not the case and annihilation took place before reaching the lowest bound states, the twin string would be best described as a broad resonance. 16 As usual the parity and charge-conjugation properties of the bound states are given by P = (−1) +1 and C = (−1) +s respectively, s being the spin. 17 To extractα s , we match it to the QCD coupling constant g s at m * = 5 TeV, i.e.g s (5 TeV) = g s (5 TeV), to then run it down to the relevant scale, taking into account that only one generation of twin quarks contributes to the running (and the twin top threshold).…”

Section: Hypercharged Quirksmentioning

confidence: 99%

“…Consequently, the collider phenomenology of twin-Higgs models is substantially different from that of a standard composite-NGB Higgs, see e.g. [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Hypercharged naturalness

Serra

Stelzl

Torre

et al. 2019

J. High Energ. Phys.

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We present an exceptional twin-Higgs model with the minimal symmetry structure for an exact implementation of twin parity along with custodial symmetry. Twin particles are mirrors of the Standard Model yet they carry hypercharge, while the photon is identified with its twin. We thoroughly explore the phenomenological signatures of hypercharged naturalness: long-lived charged particles, a colorless twin top with electric charge 2/3 that once pair-produced, bounds via twin-color interactions and can annihilate to dileptons or a Higgs plus a photon or a Z, and glueballs produced from Higgs decays and twin-quarkonium annihilation that either decay displaced, or are stable on collider scales and eventually decay to diphotons. Prospects for detection of these signatures are also discussed.

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Section: Hypercharged Quirksmentioning

confidence: 98%

Section: Twin Pseudo-ngbsmentioning

confidence: 99%

Section: Hypercharged Quirksmentioning

confidence: 99%

“…Consequently, the collider phenomenology of twin-Higgs models is substantially different from that of a standard composite-NGB Higgs, see e.g. [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Hypercharged naturalness

Serra

Stelzl

Torre

et al. 2019

J. High Energ. Phys.

View full text Add to dashboard Cite

show abstract

“…The results are fairly robust to the choice of these parameters, only being modified slightly by the choice of λ 1 which scales the mixing of the SM-like Higgs with the twin Higgs, as seen in eq. (14). In addition, there is also weak dependence of the Higgs couplings on the mass parameters m f i f j (see eq.…”

Section: Constraintsmentioning

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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Twin Higgs portal dark matter

Curtin

Gryba

2021

J. High Energ. Phys.

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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.

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

Cited by 15 publications

References 155 publications

Hypercharged naturalness

Hypercharged naturalness

Flavorful two-Higgs-doublet models with a twist

Twin Higgs portal dark matter

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