Matter power spectrum of light freeze-in dark matter: With or without self-interaction

Huo, Ran

doi:10.1016/j.physletb.2020.135251

Cited by 21 publications

(18 citation statements)

References 34 publications

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“…The exact lower bound on warm dark matter mass from free streaming[79] depends on its momentum distribution. See, e.g [80,81]. for recent analyses.…”

mentioning

confidence: 99%

Neutrino dark matter and the Higgs portal: improved freeze-in analysis

Romeri

Karamitros

Lebedev

et al. 2020

J. High Energ. Phys.

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Sterile neutrinos are one of the leading dark matter candidates. Their masses may originate from a vacuum expectation value of a scalar field. If the sterile neutrino couplings are very small and their direct coupling to the inflaton is forbidden by the lepton number symmetry, the leading dark matter production mechanism is the freeze-in scenario. We study this possibility in the neutrino mass range up to 1 GeV, taking into account relativistic production rates based on the Bose-Einstein statistics, thermal masses and phase transition effects. The specifics of the production mechanism and the dominant mode depend on the relation between the scalar and sterile neutrino masses as well as on whether or not the scalar is thermalized. We find that the observed dark matter abundance can be produced in all of the cases considered. We also revisit the freeze-in production of a Higgs portal scalar, pointing out the importance of a fusion mode, as well as the thermalization constraints.

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“…The exact lower bound on warm dark matter mass from free streaming[79] depends on its momentum distribution. See, e.g [80,81]. for recent analyses.…”

mentioning

confidence: 99%

Neutrino dark matter and the Higgs portal: improved freeze-in analysis

Romeri

Karamitros

Lebedev

et al. 2020

J. High Energ. Phys.

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“…These DM candidates are known as feebly interacting massive particles (FIMPs). Although FIMP scenarios are, generically, more difficult to test due to the smallness of the couplings, some can be probed through colliders [10][11][12][13][14][15], direct [14,[16][17][18][19][20][21][22] and indirect [23][24][25] detection searches, as well as astrophysical/cosmological observations [13,[19][20][21]26].…”

Section: Jhep09(2021)056mentioning

confidence: 99%

Testing freeze-in with axial and vector Z′ bosons

Cosme

Dutra

Godfrey

et al. 2021

J. High Energ. Phys.

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The freeze-in production of Feebly Interacting Massive Particle (FIMP) dark matter in the early universe is an appealing alternative to the well-known — and constrained — Weakly Interacting Massive Particle (WIMP) paradigm. Although challenging, the phenomenology of FIMP dark matter has been receiving growing attention and is possible in a few scenarios. In this work, we contribute to this endeavor by considering a Z′ portal to fermionic dark matter, with the Z′ having both vector and axial couplings and a mass ranging from MeV up to PeV. We evaluate the bounds on both freeze-in and freeze-out from direct detection, atomic parity violation, leptonic anomalous magnetic moments, neutrino-electron scattering, collider, and beam dump experiments. We show that FIMPs can already be tested by most of these experiments in a complementary way, whereas WIMPs are especially viable in the Z′ low mass regime, in addition to the Z′ resonance region. We also discuss the role of the axial couplings of Z′ in our results. We therefore hope to motivate specific realizations of this model in the context of FIMPs, as well as searches for these elusive dark matter candidates.

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“…32,33,34,35 Since the first introduction of Self Interactions in WDM 36 , it was realized that a combined model could provide interesting modifications in their dynamics. Indeed, Self Interactions do not only have an effect during structure formation, but also in perturbation evolution 37,38 and DM production. 12,39 This last point was studied in the past in the context of νMSM and, in particular, as mentioned in reference, 40 the phenomenon of mediator decay can significantly relax the parameter space of the model.…”

Section: Self Interactions and Wdmmentioning

confidence: 99%

“…Self Interactions have already been found to have significant effects in the evolution of linear cosmological perturbations. 36,37,38 In particular, the effects of these interactions can be realized in the power spectrum and, in the realm of WDM, it can lead to interesting scenarios such as non relativistic self decoupling (a.k.a. late kinetic decoupling).…”

Section: Siwdm and Linear Cosmologymentioning

confidence: 99%

The Role of Self Interactions in the Cosmological Evolution of Warm Dark Matter

Yunis¹,

Argüelles²,

Nacir³

et al. 2021

Preprint

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In this work we present a summary of recent studies on the effects of elastic self interactions in the evolution of Warm Dark Matter models (WDM), focusing on structure formation and the evolution of cosmological perturbations. We pay special attention to a particular class of sterile neutrino WDM known as νMSM and provide examples for the case of vector field self interactions. We calculate the effects of assuming self interacting dark matter in X-Ray astrophysical observations, in the formation of fermionic DM halos in (quasi) equilibrium states and in the evolution of DM perturbations in the early universe, assuming particle masses between O(1 − 100) keV. In the latter topic, we perform simulations using a modification to the public Boltzmann solver CLASS and compare our results with observations. We find self interactions to be an interesting addition to WDM models, which can alleviate tensions both present in standard CDM cosmology and regarding WDM itself, as well as provide an interesting avenue for DM halo formation.

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Matter power spectrum of light freeze-in dark matter: With or without self-interaction

Cited by 21 publications

References 34 publications

Neutrino dark matter and the Higgs portal: improved freeze-in analysis

Neutrino dark matter and the Higgs portal: improved freeze-in analysis

Testing freeze-in with axial and vector Z′ bosons

The Role of Self Interactions in the Cosmological Evolution of Warm Dark Matter

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