Constraints on neutrino -- dark matter interactions from cosmic microwave background and large scale structure data

Serra, P.; Zalamea, Federico; Cooray, Asantha; Mangano, Gianpiero; Melchiorri, A.

doi:10.48550/arxiv.0911.4411

Cited by 11 publications

(14 citation statements)

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“…The dark sector of our Universe may be more featured than the conventional picture of weakly interacting CDM particles and neutrinos. For instance, the possibility of nonminimal interactions of dark matter have been intensely investigated in the literature from different motivations and perspectives, e.g., dark matter interaction with DE [23][24][25], neutrinos [26,27], baryons [28][29][30], photons [31,32] and dark radiation [33,34]. In this paper, we follow a novel approach assuming that CDM and relativistic relics (neutrinos and any other relativistic relics) are interacting only gravitationally and have the conventional intrinsic properties, namely, have the equations of state as usual as p = 0 and p/ρ = 1/3, respectively, but couple to the spacetime in accordance with a modified gravity, namely, the scale-independent energy-momentum squared gravity, which allows different gravitational couplings for the different species of the sources, and thereby induces a pseudo nonminimal interaction of each species culminating in modifications at the background and perturbative levels.…”

Section: Introductionmentioning

confidence: 99%

Cosmological implications of scale-independent energy-momentum squared gravity: Pseudo nonminimal interactions in dark matter and relativistic relics

et al. 2018

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In this paper, we introduce a scale-independent energy-momentum squared gravity (EMSG) that allows different gravitational couplings for different types of sources, which may lead to scenarios with many interesting applications/implications in cosmology. In the present study, to begin with, we study a modification of the Λ cold dark matter (ΛCDM) model, where photons and baryons couple to the spacetime as in general relativity, while the cold dark matter and relativistic relics (neutrinos and any other relativistic relics) couple to the spacetime in accordance with EMSG. This scenario induces pseudo nonminimal interactions on these components, leading to modification at both the background and perturbative levels. A consequence of this scenario is that the dimensionless free parameter of the theory may induce direct changes on the effective number of the relativistic species, without the need to introduce new extra species. In order to quantify the observational consequences of the cosmological scenario, we use the cosmic microwave background Planck data (temperature, polarization, and lensing power spectrum) and baryonic acoustic oscillations data. We find that the free model parameter is too small to induce statistically significant corrections on the ΛCDM model due to EMSG. We deduce that the model presented here is quite rich with promising cosmological applications/implications that deserve further investigations.

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Section: Introductionmentioning

confidence: 99%

Cosmological implications of scale-independent energy-momentum squared gravity: Pseudo nonminimal interactions in dark matter and relativistic relics

et al. 2018

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“…Models of light scalar bosons coupled to neutrinos, e.g., Majorons, have been extensively studied, and there are strong constraints on such couplings [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. Interestingly, interactions with a new light vector boson seem to have been largely overlooked and we address this possibility in this paper.…”

Section: Introductionmentioning

confidence: 99%

Constraints on new neutrino interactions via light Abelian vector bosons

2014

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We calculate new constraints on extra neutrino interactions via light Abelian vector bosons, where the boson mass arises from Stuckelberg mechanism. We use the requirement that Z, W , and kaon decays, as well as electron-neutrino scattering, are not altered by the new interactions beyond what is allowed by experimental uncertainties. These constraints are strong and apply to neutrinophilic dark matter, where interactions of neutrinos and dark matter via a new gauge boson are important. In particular, we show that models where neutrino interactions are needed to solve the small-scale structure problems in the ΛCDM cosmology are constrained.

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“…Neutrino interaction with DM, ν-DM for short, could have strong implications at cosmological scales. Interactions of neutrinos with light scalar fields have been studied with some interesting implications noticed, such as a reduction of the relic neutrino density, leading to a neutrinoless universe [35], or a modification on the CMB spectra [36,37], or even a connection between the smallness of neutrino mass and a MeV-mass scalar field DM [38]. Furthermore, ν-DM interaction might affect the flux of UHE neutrinos.…”

Section: Introductionmentioning

confidence: 99%

Confusing the extragalactic neutrino flux limit with a neutrino propagation limit

Barranco

Miranda

Moura

et al. 2011

J. Cosmol. Astropart. Phys.

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ABSTRACT:We study the possible suppression of the extragalactic neutrino flux due to a nonstandard interaction during its propagation. In particular, we study neutrino interaction with an ultra-light scalar field dark matter. It is shown that the extragalactic neutrino flux may be suppressed by such an interaction, leading to a new mechanism to reduce the ultra-high energy neutrino flux. We study both the cases of non-self-conjugate as well as self-conjugate dark matter. In the first case, the suppression is independent of the neutrino and dark matter masses. We conclude that care must be taken when explaining limits on the neutrino flux through source acceleration mechanisms only, since there could be other mechanisms for the reduction of the neutrino flux.

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Constraints on neutrino -- dark matter interactions from cosmic microwave background and large scale structure data

Cited by 11 publications

References 0 publications

Cosmological implications of scale-independent energy-momentum squared gravity: Pseudo nonminimal interactions in dark matter and relativistic relics

Cosmological implications of scale-independent energy-momentum squared gravity: Pseudo nonminimal interactions in dark matter and relativistic relics

Constraints on new neutrino interactions via light Abelian vector bosons

Confusing the extragalactic neutrino flux limit with a neutrino propagation limit

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