Phenomenology of doublet-triplet fermionic dark matter in nonstandard cosmology and multicomponent dark sectors

Betancur, Amalia; Zapata, Óscar

doi:10.1103/physrevd.98.095003

Cited by 20 publications

(9 citation statements)

References 72 publications

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“…This makes it possible to circumvent the well-known ∼100 TeV upper limit on the mass of the DM, based on partial wave unitarity [414] (for related scenarios, see Refs. [415,416,417,341,418,295,278,419,227,420,421,422,39,261,282,423,284,424,288,265,425,426,289,301,300,427,428,429,430,431,432,433,302,434,435,436,437,438,439,290]; for alternative "freeze-in" production of DM in scenarios with a nonstandard expansion phase, see Refs. [440,441,425,442,443,426,289,…”

Section: Consequences For Dark Matter (Authors: a Berlin D Hooper And G Krnjaic)mentioning

confidence: 99%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

194

140

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It is commonly assumed that the energy density of the Universe was dominated by radiation between reheating after inflation and the onset of matter domination 54,000 years later. While the abundance of light elements indicates that the Universe was radiation dominated during Big Bang Nucleosynthesis (BBN), there is scant evidence that the Universe was radiation dominated prior to BBN. It is therefore possible that the cosmological history was more complicated, with deviations from the standard radiation domination during the earliest epochs. Indeed, several interesting proposals regarding various topics such as the generation of dark matter, matter-antimatter asymmetry, gravitational waves, primordial black holes, or microhalos during a nonstandard expansion phase have been recently made. In this paper, we review various possible causes and consequences of deviations from radiation domination in the early Universe -taking place either before or after BBN -and the constraints on them, as they have been discussed in the literature during the recent years.

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Section: Consequences For Dark Matter (Authors: a Berlin D Hooper And G Krnjaic)mentioning

confidence: 99%

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

194

140

View full text Add to dashboard Cite

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“…δL ⊃ χ n Hχ n+1 + h.c., where χ n stands for a fermionic or bosonic n-plet under SU L (2), and DM is the lightest neutral mass eigenstate arising from the mixing of χ n and χ n+1 after the electroweak phase transition (EWPT). These models have been among the archetypical scenarios of DM coupled to the Weak interactions of the SM (WIMPs) [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34].…”

Section: Introductionmentioning

confidence: 99%

Bound states of WIMP dark matter in Higgs-portal models. Part II. Thermal decoupling

Oncala

Petraki

2021

J. High Energ. Phys.

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The Higgs doublet can mediate a long-range interaction between multi-TeV particles coupled to the Weak interactions of the Standard Model, while its emission can lead to very rapid bound-state formation processes and bound-to-bound transitions. Using the rates calculated in a companion paper, here we compute the thermal decoupling of multi-TeV WIMP dark matter coupled to the Higgs, and show that the formation of metastable dark matter bound states via Higgs-doublet emission and their decay decrease the relic density very significantly. This in turn implies that WIMP dark matter may be much heavier than previously anticipated, or conversely that for a given mass, the dark matter couplings to the Higgs may be much lower than previously predicted, thereby altering the dark matter phenomenology. While we focus on a minimal singlet-doublet model in the coannihilation regime, our calculations can be extended to larger multiplets where the effects under consideration are expected to be even more significant.

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“…enhancement of the cross sections is due to kinematics, the enhancement will remain stable under radiative corrections. Note that in this model, χ 1 forms only a fraction f χ of the total dark matter abundance [43,[72][73][74][75][76][77]:…”

Section: B Direct Detection Of Dark Matter Particlesmentioning

confidence: 99%

Mixed WIMP-axion dark matter

et al. 2019

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We study the experimental constraints on a model of a two-component dark matter, consisting of the QCD axion, and a scalar particle, both contributing to the dark matter relic abundance of the Universe. The global Peccei-Quinn symmetry of the theory can be spontaneously broken down to a residual Z 2 symmetry, thereby identifying this scalar as a stable weakly interacting massive particle, i.e., a dark matter candidate, in addition to the axion. We perform a comprehensive study of the model using the latest data from dark matter direct and indirect detection experiments, as well as new physics searches at the Large Hadron Collider. We find that although the model is mostly constrained by the dark matter detection experiments, it is still viable around a small region of the parameter space where the scalar dark matter is half as heavy as the Standard Model Higgs. In this allowed region, the bounds from these experiments are evaded due to a cancellation mechanism in the dark matter-Higgs coupling. The collider search results, however, are shown to impose weak bounds on the model.

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Phenomenology of doublet-triplet fermionic dark matter in nonstandard cosmology and multicomponent dark sectors

Cited by 20 publications

References 72 publications

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

The First Three Seconds: a Review of Possible Expansion Histories of the Early Universe

Bound states of WIMP dark matter in Higgs-portal models. Part II. Thermal decoupling

Mixed WIMP-axion dark matter

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