Can dark neutrino interactions phase out the Hubble tension?

Ghosh, S.; Khatri, Rishi; Roy, T.

doi:10.1103/physrevd.102.123544

Cited by 59 publications

(45 citation statements)

References 99 publications

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“…Besides accommodating sterile neutrinos in cosmology, neutrino non-standard interactions mediated by a light (pseudo)scalar are also investigated as a way to solve the Hubble constant problem [110][111][112][113][114][115][116][117] 2 .…”

Section: Cosmological Constraintsmentioning

confidence: 99%

Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives

Archidiacono,

Gariazzo

2022

Preprint

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The presence of light sterile neutrinos is one of the unanswered questions of particle physics. The cosmological counterpart is represented by dark radiation, i.e. any form of radiation present in the early Universe besides photons and standard (active) neutrinos. This short review provides a comprehensive overview of the two problems and of their connection. We review the status of neutrino oscillation anomalies, commenting on the most recent oscillation data and their mutual tensions, and we discuss the constraints from other terrestrial probes. We show the shortcomings of translating light sterile neutrinos in cosmology as additional thermalised relativistic species, produced by neutrino oscillations, and we detail alternative solutions, specifically focusing on neutrino non standard interactions, and on their link to the Hubble constant problem. The impact of a new force leading to dark radiation -dark matter interactions is also discussed in the realm of new physics in the dark sector.

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Section: Cosmological Constraintsmentioning

confidence: 99%

Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives

Archidiacono,

Gariazzo

2022

Preprint

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“…It is well-known that the neutrino physics is a new physics beyond the SM, and there might be new neutrino interactions in addition to the electroweak interaction mediated by the Z and W bosons. Furthermore, some typical neutrino self-interactions have been proposed to relieve the Hubble tension problem [13][14][15], or to avoid the constraint of the X-ray observations on the sterile neutrino dark matter (DM) [16,17]. In this letter, we first point out that the CNB may be boosted by cosmic rays given a new neutrino interaction.…”

Section: Introductionmentioning

confidence: 97%

A new Direct Detection Strategy for the Cosmic Neutrino Background

Wei¹,

Feng²,

Jin³

et al. 2021

Preprint

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The direct detection of cosmic neutrino background (CNB) has been a longstanding challenge in particle physics, due to its low number density and tiny neutrino masses. In this work, we consider the spectrum of the CNB boosted by cosmic rays via the neutrino self-interaction, and calculate the event rate of the boosted CNB-plasmon scattering in term of the dielectric response, which accounts for in-medium screening effect of a condensed matter target. This can be taken as the new direct detection strategy for the CNB in complementary to the traditional one, which captures the CNB on a β-unstable nucleus. Our result shows that one can either see the event of the CNB for the exposure of per kg•year, or puts a strong constraint on the neutrino self-interaction. We further explore the background induced by the sub-MeV dark matter and the boosted super-light dark matter.

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“…Given that a Majorana mass for the right-handed neutrino softly breaks lepton number, it could reasonably be at or below the scale of neutrino masses, ∼ 0.1 eV. As a standard model singlet, such a right handed neutrino is of significant phenomenological interest since it can be a portal into a variety of dark sectors including those associated with the physics of dark matter or dark energy [4][5][6][7][8][9][10][11][12][13][14][15][16]. The dark matter can exist at any scale while the physics directly associated with dark energy would be light, at scales comparable to the scale of neutrinos.…”

Section: Introductionmentioning

confidence: 99%

Neutrino interactions in the late universe

Green

Kaplan

Rajendran

2021

J. High Energ. Phys.

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The cosmic neutrino background is both a dramatic prediction of the hot Big Bang and a compelling target for current and future observations. The impact of relativistic neutrinos in the early universe has been observed at high significance in a number of cosmological probes. In addition, the non-zero mass of neutrinos alters the growth of structure at late times, and this signature is a target for a number of upcoming surveys. These measurements are sensitive to the physics of the neutrino and could be used to probe physics beyond the standard model in the neutrino sector. We explore an intriguing possibility where light right-handed neutrinos are coupled to all, or a fraction of, the dark matter through a mediator. In a wide range of parameter space, this interaction only becomes important at late times and is uniquely probed by late-time cosmological observables. Due to this coupling, the dark matter and neutrinos behave as a single fluid with a non-trivial sound speed, leading to a suppression of power on small scales. In current and near-term cosmological surveys, this signature is equivalent to an increase in the sum of the neutrino masses. Given current limits, we show that at most 0.5% of the dark matter could be coupled to neutrinos in this way.

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Can dark neutrino interactions phase out the Hubble tension?

Cited by 59 publications

References 99 publications

Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives

Two sides of the same coin: sterile neutrinos and dark radiation. Status and perspectives

A new Direct Detection Strategy for the Cosmic Neutrino Background

Neutrino interactions in the late universe

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