Dark matter produced from neutrinos

Hufnagel, Marco; Xu, Xun-Jie

doi:10.1088/1475-7516/2022/01/043

Cited by 10 publications

(10 citation statements)

References 93 publications

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“…In this scenario, the contribution to N eff can be very significant without overproducing DM. In contrast, DM frozenin from ν R or more directly from ν L usually cannot change N eff significantly [41,73] because the amount of energy transferred to DM is limited by Ω χ h 2 = 0.12, corresponding to n χ = 9.74 × 10 −12 eV −4 /(2m χ ) ≈ 6.3 × 10 −4 cm −3 × (MeV/m χ ) which is much lower than the neutrino number density. The potentially significant contribution to N eff in the FE case calls for a more dedicated study in light of current and upcoming precision measurements of N eff .…”

Section: Observational Consequencesmentioning

confidence: 97%

Dark matter produced from right-handed neutrinos

2023

J. Cosmol. Astropart. Phys.

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Right-handed neutrinos (RHNs) provide a natural portal to a dark sector accommodating dark matter (DM). In this work, we consider that the dark sector is connected to the standard model only via RHNs and ask how DM can be produced from RHNs. Our framework concentrates on a rather simple and generic interaction that couples RHNs to a pair of dark particles. Depending on whether RHNs are light or heavy in comparison to the dark sector and also on whether one or both of them are in the freeze-in/out regime, there are many distinct scenarios resulting in rather different results. We conduct a comprehensive and systematic study of all possible scenarios in this paper. For illustration, we apply our generic results to the type-I seesaw model with the dark sector extension, addressing whether and when DM in this model can be in the freeze-in or freeze-out regime. Some observational consequences in this framework are also discussed.

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Section: Observational Consequencesmentioning

confidence: 97%

Dark matter produced from right-handed neutrinos

2023

J. Cosmol. Astropart. Phys.

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“…In this experiment, it is expected that around 4 events for Dirac neutrinos and 8 events for Majorana neutrinos per year could be detected on this target. Although the direct detection of the CνB signal seems challenging with small neutrino masses, several phenomenological aspects and sensitivity estimates of PTOLEMY experiment have been done in the Literature [25][26][27][28][29][30][31][32].…”

Section: Jcap06(2023)021mentioning

confidence: 99%

“…Identical fermionic particles cannot occupy the same quantum state. Therefore for a given escape velocity (or a momentum), there exists a maximum number density when the particles occupy the energy states form the lowest level [31,37]. This gives the bound on the relic density of fermionic DM.…”

Section: Phase Space Boundmentioning

confidence: 99%

Probing sterile neutrino dark matter in the PTOLEMY-like experiment

Choi

Lkhagvadorj

Yoo

2023

J. Cosmol. Astropart. Phys.

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We study the prospect to detect the cosmic background of sterile neutrinos in the tritium β-decay, such as the PTOLEMY-like experiments. The sterile neutrino with mass between 1 eV–10 keV may contribute to the local density as warm or cold dark matter component. In this study, we investigate the possibility for searching them in the models with different production in the early Universe, without assuming sterile neutrino as full dark matter component. In these models, especially with low-reheating temperature and late-time phase transition, the capture rate per year can be greatly enhanced to be 𝒪(10) around the mass range 10–100 eV without violating other astrophysical and cosmological observations.

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“…They are present in many models of DM, such as sterile neutrino DM, neutrino portal models or other scenarios which link the dual problems of neutrino masses and DM. On the observational side, DM-neutrino couplings are generically less constrained than DM couplings with other SM particles while their cosmological phenomenology is rich [59][60][61][62][63][64] and provides an additional way to test these, albeit indirectly. Moreover, there could be significant implications for structure formation, indeed some cosmological data seems to favour such interactions [65].…”

Section: Jhep06(2022)093mentioning

confidence: 99%

Neutrino forces and the Sommerfeld enhancement

Coy

2022

J. High Energ. Phys.

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The Sommerfeld enhancement plays an important role in dark matter (DM) physics, and can significantly enhance the annihilation cross section of non-relativistic DM particles. In this paper, we study the effect of neutrino forces, which are generated by the exchange of a pair of light neutrinos, on the Sommerfeld enhancement. We demonstrate that in certain cases, a neutrino force can cause a significant correction to the Sommerfeld enhancement. Models that can realise DM-neutrino interactions and sizeable Sommerfeld enhancement are also briefly discussed, together with the impacts on DM phenomenology of neutrino forces.

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Dark matter produced from neutrinos

Cited by 10 publications

References 93 publications

Dark matter produced from right-handed neutrinos

Dark matter produced from right-handed neutrinos

Probing sterile neutrino dark matter in the PTOLEMY-like experiment

Neutrino forces and the Sommerfeld enhancement

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