Hidden charged dark matter and chiral dark radiation

Ko, Pyungwon; Nagata, Natsumi; Tang, Yong

doi:10.1016/j.physletb.2017.08.065

Cited by 54 publications

(49 citation statements)

References 113 publications

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“…A similar effect can also be achieved in models where DM is coupled to a thermal bath of dark radiation which erases structures in the DM distribution (see e.g. [86][87][88][89][90][91][92][93]). A very remarkable feature in the matter power spectrum that is very characteristic of this interacting model is the shift in the turnover.…”

Section: Cmb and Matter Power Spectramentioning

confidence: 74%

On structure formation from a small-scales-interacting dark sector

Asghari

Jiménez

Khosravi

et al. 2019

J. Cosmol. Astropart. Phys.

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We consider a cosmological model with an interaction between dark matter and dark energy which leaves the background cosmology unaffected and only affects the evolution of the perturbations. This is achieved by introducing a coupling given in terms of the relative velocities of dark matter and dark energy. This interaction has the distinctive feature of appearing predominantly on small scales, where peculiar velocities can become important. We confront the predictions of the model to cosmological observations and find a potential alleviation of the known tension in the amplitude of density perturbations as measured by low redshift galaxy surveys and the Planck data. The model also predicts a shift in the turnover of the matter power spectrum which does not depend on the horizon at equality (fixed by the background cosmology and, thus, unaffected by the perturbations) and is entirely due to the interaction between dark matter and dark energy. A bias in the peculiar velocity between baryons and dark matter is also shown to be a unique feature of this type of interactions in the dark sector.

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Section: Cmb and Matter Power Spectramentioning

confidence: 74%

On structure formation from a small-scales-interacting dark sector

Asghari

Jiménez

Khosravi

et al. 2019

J. Cosmol. Astropart. Phys.

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“…From the well-studied N d = 3 case, α ≈ 7 [7]. One may expect that the mass spectra of N d > 3 assembles that of SU (3).…”

Section: Introductionmentioning

confidence: 99%

Slightly ultra-violet freeze-in a hidden gluonic sector

Kang

2020

Physics Letters B

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The dark glueball (DGB) from a hidden Yang-Mills sector is a simple non-WIMP dark matter candidate characterized by very few parameters. However, it suffers the over dense issue. To overcome it, in general the dark sector is required to be hierarchically cooler than the visible sector. To naturally generate the desired hierarchy, in this paper we introduce higher dimensional operators coupling the dark gauge field strength tensor to the standard model (SM) Higgs doublets or gauge field strength tensors. By tracking the different phases of the universe from the end of inflation, prethermalization, reheating to the radiation dominance era, we show that these operators can make the DGB be a viable dark matter candidate over a wide mass region, from the sub-GeV to multi-PeV or even beyond. At the same time, these operators open decay channels of DGB to the SM species, and partial of the parameter space could leave hints in the cosmic ray. *

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“…Resolving these anomalies would require a framework that generically reduces the value of σ 8 as compared to the ΛCDM model, while enhancing H 0 . Several ideas have been proposed that make use of a non-minimal dark sector to address these problems [61,[66][67][68][69][70][71], and the MTH appears to possess all of the necessary features.…”

Section: Introductionmentioning

confidence: 99%

Cosmological signatures of a mirror twin Higgs

Chacko

Curtin

Geller

et al. 2018

J. High Energ. Phys.

141

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We explore the cosmological signatures associated with the twin baryons, electrons, photons and neutrinos in the Mirror Twin Higgs framework. We consider a scenario in which the twin baryons constitute a subcomponent of dark matter, and the contribution of the twin photon and neutrinos to dark radiation is suppressed due to late asymmetric reheating, but remains large enough to be detected in future cosmic microwave background (CMB) experiments. We show that this framework can lead to distinctive signals in large scale structure and in the cosmic microwave background. Baryon acoustic oscillations in the mirror sector prior to recombination lead to a suppression of structure on large scales, and leave a residual oscillatory pattern in the matter power spectrum. This pattern depends sensitively on the relative abundances and ionization energies of both twin hydrogen and helium, and is therefore characteristic of this class of models. Although both mirror photons and neutrinos constitute dark radiation in the early universe, their effects on the CMB are distinct. This is because prior to recombination the twin neutrinos free stream, while the twin photons are prevented from free streaming by scattering off twin electrons. In the Mirror Twin Higgs framework the relative contributions of these two species to the energy density in dark radiation is predicted, leading to testable effects in the CMB. These highly distinctive cosmological signatures may allow this class of models to be discovered, and distinguished from more general dark sectors.

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Hidden charged dark matter and chiral dark radiation

Cited by 54 publications

References 113 publications

On structure formation from a small-scales-interacting dark sector

On structure formation from a small-scales-interacting dark sector

Slightly ultra-violet freeze-in a hidden gluonic sector

Cosmological signatures of a mirror twin Higgs

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