Freeze-in production of dark matter prior to early matter domination

Allahverdi, Rouzbeh; Osiński, Jacek K.

doi:10.1103/physrevd.101.063503

Cited by 19 publications

(16 citation statements)

References 96 publications

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“…The first possibility is that n X is increased due to (nonthermal) production of X via direct φ decays to these X states. In particular, it has been observed that by adjusting the φ branching fraction to DM one can reproduce the observed relic density in a large range of scenarios [42,280,281,282,283,284,285,286,287,288,289,290,291,292].…”

Section: The Transition To Radiation Dominationmentioning

confidence: 99%

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

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

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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: The Transition To Radiation Dominationmentioning

confidence: 99%

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

Allahverdi¹,

Amin²,

Berlin³

et al. 2021

TheOJA

Self Cite

194

140

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show abstract

“…As mentioned previously, the generation of a large amount (O(10 4 ) ) of entropy in the early Universe due to the late decay of the flat direction responsible for the breaking of FSU( 5) is a generic feature of FSU(5) cosmology [13][14][15]21,22], so we do not interpret this adiabatic calculation of χ h 2 as a necessary constraint. Indeed when accounting for the late entropy production, we expect that parameters yielding h 2 ∼ 100 − 1000 would correspond better to the present relic density h 2 0.1 (see [76,77] for related work).…”

Section: Universal Boundary Conditionsmentioning

confidence: 85%

Flipped SU(5) GUT phenomenology: proton decay and $$\mathbf {g_\mu - 2}$$

et al. 2021

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We consider proton decay and $$g_\mu - 2$$ g μ - 2 in flipped SU(5) GUT models. We first study scenarios in which the soft supersymmetry-breaking parameters are constrained to be universal at some high scale $$M_{in}$$ M in above the standard GUT scale where the QCD and electroweak SU(2) couplings unify. In this case the proton lifetime is typically $$ > rsim 10^{36}$$ ≳ 10 36 years, too long to be detected in the foreseeable future, and the supersymmetric contribution to $$g_\mu - 2$$ g μ - 2 is too small to contribute significantly to resolving the discrepancy between the experimental measurement and data-driven calculations within the Standard Model. However, we identify a region of the constrained flipped SU(5) parameter space with large couplings between the 10- and 5-dimensional GUT Higgs representations where $$p \rightarrow e^+ \pi ^0$$ p → e + π 0 decay may be detectable in the Hyper-Kamiokande experiment now under construction, though the contribution to $$g_\mu -2$$ g μ - 2 is still small. A substantial contribution to $$g_\mu - 2$$ g μ - 2 is possible, however, if the universality constraints on the soft supersymmetry-breaking masses are relaxed. We find a ‘quadrifecta’ region where observable proton decay co-exists with a (partial) supersymmetric resolution of the $$g_\mu - 2$$ g μ - 2 discrepancy and acceptable values of $$m_h$$ m h and the relic LSP density.

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“…We finally note that the case of freeze-in depends on the initial host-sector temperature because freeze-in of Φ occurs in RD, such that the time of peak Φ production from the background occurs at the initial time (see [39] for details of freeze-in during RD before EMD). In our numerical calculations, we chose the initial time arbitrarily, with an initial energy density configuration consisting of dominant radiation and negligible Φ.…”

Section: Jhep11(2020)133mentioning

confidence: 99%

“…One can see this by analyzing the system in(5.3). For more on the effects of a large abundance of radiation during EMD, see[38,39].…”

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confidence: 99%

Hidden sector monopole dark matter with matter domination

Graesser

Osiński

2020

J. High Energ. Phys.

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The thermal freeze-out mechanism for relic dark matter heavier than O(10 − 100 TeV) requires cross-sections that violate perturbative unitarity. Yet the existence of dark matter heavier than these scales is certainly plausible from a particle physics perspective, pointing to the need for a non-thermal cosmological history for such theories. Topological dark matter is a well-motivated scenario of this kind. Here the hidden-sector dark matter can be produced in abundance through the Kibble-Zurek mechanism describing the non-equilibrium dynamics of defects produced in a second order phase transition. We revisit the original topological dark matter scenario, focusing on hidden-sector magnetic monopoles, and consider more general cosmological histories. We find that a monopole mass of order (1–105) PeV is generic for the thermal histories considered here, if monopoles are to entirely reproduce the current abundance of dark matter. In particular, in a scenario involving an early era of matter domination, the monopole number density is always less than or equal to that in a pure radiation dominated equivalent provided a certain condition on critical exponents is satisfied. This results in a larger monopole mass needed to account for a fixed relic abundance in such cosmologies.

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Freeze-in production of dark matter prior to early matter domination

Cited by 19 publications

References 96 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

Flipped SU(5) GUT phenomenology: proton decay and $$\mathbf {g_\mu - 2}$$

Hidden sector monopole dark matter with matter domination

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