Neutrino meets ultralight dark matter: $\boldsymbol{0νββ}$ decay and cosmology

Huang, Guo-yuan; Nath, Newton

doi:10.48550/arxiv.2111.08732

Cited by 7 publications

(7 citation statements)

References 67 publications

(99 reference statements)

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“…[1] for a review). By contrast, there are relatively few bounds on DM induced time dependence in the neutrino sector [2][3][4][5][6][7][8][9][10][11][12][13][14][15] and the corresponding limits constrain comparatively large interaction strengths primarily via flavor oscillations.…”

Section: Introductionmentioning

confidence: 99%

Constraining Feeble Neutrino Interactions with Ultralight Dark Matter

Dev¹,

Krnjaic²,

Machado³

et al. 2022

Preprint

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If ultralight ( eV), bosonic dark matter couples to right handed neutrinos, active neutrino masses and mixing angles depend on the ambient dark matter density. When the neutrino Majorana mass, induced by the dark matter background, is small compared to the Dirac mass, neutrinos are "pseudo-Dirac" fermions that undergo oscillations between nearly degenerate active and sterile states.We present a complete cosmological history for such a scenario and find severe limits from a variety of terrestrial and cosmological observables. For scalar masses in the "fuzzy" dark matter regime (∼ 10 −20 eV), these limits exclude couplings of order 10 −30 , corresponding to Yukawa interactions comparable to the gravitational force between neutrinos and surpassing equivalent limits on time variation in scalar-induced electron and proton couplings.

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Section: Introductionmentioning

confidence: 99%

Constraining Feeble Neutrino Interactions with Ultralight Dark Matter

Dev¹,

Krnjaic²,

Machado³

et al. 2022

Preprint

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“…If the vacuum mass m 4 is too large compared to the potential gφ, only the effective coupling by mixing g ij ν φν i ν j will be relevant at low energies, with i and j being the indices of light neutrino mass eigenstates. However, as has been realized, such a scenario faces inevitable constraints from the observation of cosmic microwave background (CMB) [42][43][44]64]. The growth of φ with the redshift will render cosmic neutrinos non-relativistic in the early Universe, which is in contradiction with the free-streaming property of relativistic neutrinos from the CMB observation.…”

Section: Introductionmentioning

confidence: 99%

Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal

Huang,

Lindner,

Martínez-Miravé

et al. 2022

Preprint

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We investigate a consistent scenario of time-varying neutrino masses, and discuss its impact on cosmology, beta decay, and neutrino oscillation experiments. Such time-varying masses are assumed to be generated by the coupling between a sterile neutrino and an ultralight scalar field, which in turn affects the light neutrinos by mixing. We demonstrate how various cosmological bounds, such as those coming from Big Bang nucleosynthesis, the cosmic microwave background, as well as large scale structures, can be evaded in this model. This scenario can be further constrained using multiple terrestrial experiments. In particular, for beta-decay experiments like KATRIN, non-trivial distortions to the electron spectrum can be induced, even when time-variation is fast and gets averaged out. Furthermore, the presence of time-varying masses of sterile neutrinos will alter the interpretation of light sterile neutrino parameter space in the context of the reactor and gallium anomalies. In addition, we also study the impact of such time-varying neutrino masses on results from the BEST collaboration, which have recently strengthened the gallium anomaly. If confirmed, we find that the time-varying neutrino mass hypothesis could give a better fit to the recent BEST data.

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“…If these fields are sufficiently light, they oscillate in time, and can lead to temporal variations in various constants of Nature. We are interested in the possibility that the ULDM field couples to neutrinos, thus affecting their masses and mixing [5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Parametric resonance in neutrino oscillations induced by ultra-light dark matter and implications for KamLAND and JUNO

Losada¹,

Nir²,

Pérez³

et al. 2022

Preprint

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If ultra-light dark matter (ULDM) exists and couples to neutrinos, the neutrino oscillation probability might be significantly altered by a parametric resonance. This resonance can occur if the typical frequency of neutrino flavor-oscillations ∆m 2 /(2E), where ∆m 2 is the mass-squared difference of the neutrinos and E is the neutrino energy, matches the oscillation frequency of the ULDM field, determined by its mass, m φ . The resonance could lead to observable effects even if the ULDM coupling is very small, and even if its typical oscillation period, given by τ φ = 2π/m φ , is much shorter than the experimental temporal resolution. Defining a small parameter φ to be the ratio between the contribution of the ULDM field to the neutrino mass and the vacuum value of the neutrino mass, the impact of the resonance is particularly significant if φ m φ L ∼ > 4, where L is the distance between the neutrino source and the detector. Such parametric resonance can improve the fit to the KamLAND experiment measurements by about 3.5σ compared to standard oscillations. This scenario will be tested by the JUNO experiment.

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Neutrino meets ultralight dark matter: $\boldsymbol{0νββ}$ decay and cosmology

Cited by 7 publications

References 67 publications

Constraining Feeble Neutrino Interactions with Ultralight Dark Matter

Constraining Feeble Neutrino Interactions with Ultralight Dark Matter

Cosmology-friendly time-varying neutrino masses via the sterile neutrino portal

Parametric resonance in neutrino oscillations induced by ultra-light dark matter and implications for KamLAND and JUNO

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