Bounds on Higgs-portal models from the LHC Higgs data

Cheung, Kingman; Ko, Pyungwon; Lee, Jae Sik; Tseng, Po-Yan

doi:10.1007/jhep10(2015)057

Cited by 40 publications

(38 citation statements)

References 65 publications

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“…The heavy quark contribution is replaced by the gluon contributions such that 14) which is obtained by calculating the triangle diagram for heavy quarks inside a loop. Then we write the trace of the stress energy tensor as follows by considering the scale anomaly; Finally we obtain the spin independent X-N scattering cross section as follows; 18) where µ N X = m N m X /(m N + m X ) is the reduced mass of nucleon and DM. Here we consider DM-neutron scattering cross section for simplicity where that of DMproton case gives almost similar result.…”

Section: Direct Detectionmentioning

confidence: 99%

Scalar dark matter search from the extended νTHDM

Baek

Das²,

Nomura³

2018

J. High Energ. Phys.

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We consider a neutrino Two Higgs Doublet Model (νTHDM) in which neutrinos obtain naturally small Dirac masses from the soft symmetry breaking of a global U (1) X symmetry. We extended the model so the soft term is generated by the spontaneous breaking of U (1) X by a new scalar field. The symmetry breaking pattern can also stabilize a scalar dark matter candidate. After constructing the model, we study the phenomenology of the dark matter: relic density, direct and indirect detection.

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Section: Direct Detectionmentioning

confidence: 99%

Scalar dark matter search from the extended νTHDM

Baek

Das²,

Nomura³

2018

J. High Energ. Phys.

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“…This bound is of course evaded if m s > m h /2. The results of the Higgs boson measurements at the LHC also give a constraint on the mixing angle α, but it is still rather weak; |α| 0.1 is enough to evade all of the existing bounds from the Higgs data [90].…”

Section: Scalar Sectormentioning

confidence: 99%

Hidden charged dark matter and chiral dark radiation

Nagata

Tang

2017

Physics Letters B

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In the light of recent possible tensions in the Hubble constant H 0 and the structure growth rate σ 8 between the Planck and other measurements, we investigate a hidden-charged dark matter (DM) model where DM interacts with hidden chiral fermions, which are charged under the hidden SU(N ) and U(1) gauge interactions. The symmetries in this model assure these fermions to be massless. The DM in this model, which is a Dirac fermion and singlet under the hidden SU(N ), is also assumed to be charged under the U(1) gauge symmetry, through which it can interact with the chiral fermions. Below the confinement scale of SU(N ), the hidden quark condensate spontaneously breaks the U(1) gauge symmetry such that there remains a discrete symmetry, which accounts for the stability of DM. This condensate also breaks a flavor symmetry in this model and Nambu-Goldstone bosons associated with this flavor symmetry appear below the confinement scale. The hidden U(1) gauge boson and hidden quarks/Nambu-Goldstone bosons are components of dark radiation (DR) above/below the confinement scale. These light fields increase the effective number of neutrinos by δN eff 0.59 above the confinement scale for N = 2, resolving the tension in the measurements of the Hubble constant by Planck and Hubble Space Telescope if the confinement scale is 1 eV. DM and DR continuously scatter with each other via the hidden U(1) gauge interaction, which suppresses the matter power spectrum and results in a smaller structure growth rate. The DM sector couples to the Standard Model sector through the exchange of a real singlet scalar mixing with the Higgs boson, which makes it possible to probe our model in DM direct detection experiments. Variants of this model are also discussed, which may offer alternative ways to investigate this scenario.

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“…Note that H 2 is the SM-like Higgs, h, and m H 2 ≃ m h where mixing angle θ is constrained to be sin θ 0.2 by data of Higgs search at the LHC [14][15][16]. 2 For small mixing, we have H 2 ≃ h and H 3 ≃ ρ.…”

Section: Jhep03(2017)059mentioning

confidence: 99%

Dark matter physics in neutrino specific two Higgs doublet model

Baek¹,

Nomura²

2017

J. High Energ. Phys.

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Although the seesaw mechanism is a natural explanation for the small neutrino masses, there are cases when the Majorana mass terms for the right-handed neutrinos are not allowed due to symmetry. In that case, if neutrino-specific Higgs doublet is introduced, neutrinos become Dirac particles and their small masses can be explained by its small VEV. We show that the same symmetry, which we assume a global U(1) X , can also be used to explain the stability of dark matter. In our model, a new singlet scalar breaks the global symmetry spontaneously down to a discrete Z 2 symmetry. The dark matter particle, lightest Z 2 -odd fermion, is stabilized. We discuss the phenomenology of dark matter: relic density, direct detection, and indirect detection. We find that the relic density can be explained by a novel Goldstone boson channel or by resonance channel. In the most region of parameter space considered, the direct detections is suppressed well below the current experimental bound. Our model can be further tested in indirect detection experiments such as FermiLAT gamma ray searches or neutrinoless double beta decay experiments.

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Bounds on Higgs-portal models from the LHC Higgs data

Cited by 40 publications

References 65 publications

Scalar dark matter search from the extended νTHDM

Scalar dark matter search from the extended νTHDM

Hidden charged dark matter and chiral dark radiation

Dark matter physics in neutrino specific two Higgs doublet model

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