Neutrino non-standard interactions meet precision measurements of Neff

Du, Yong; Yu, Jiang-Hao

doi:10.1007/jhep05(2021)058

Cited by 36 publications

(20 citation statements)

References 153 publications

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“…NSIs can give observable effects in the production, propagation, and detection of neutrinos, and so the relevant coefficients can be probed at neutrino detectors [196][197][198][199][200][201][202]. Using the approach introduced in Refs.…”

Section: Bsm Neutrino Physics: Examplesmentioning

confidence: 99%

The Forward Physics Facility: Sites, Experiments, and Physics Potential

Anchordoqui,

Ariga,

Ariga

et al. 2021

Preprint

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Section: Bsm Neutrino Physics: Examplesmentioning

confidence: 99%

The Forward Physics Facility: Sites, Experiments, and Physics Potential

Anchordoqui,

Ariga,

Ariga

et al. 2021

Preprint

Self Cite

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“…In general, these new couplings can be flavor-preserving αα and/or flavor-violating αβ with α = β and α, β = {e, µ, τ } being the lepton flavor indices. Searches of these new neutrino interactions are relevant since they may affect neutrino oscillations [114] and even other physics branches like cosmology [115] or astrophysics [12,116]. NSIs in their original definition can be studied since they enter the SM CEνNS cross section via a modified or an additional weak nuclear charge [29,30,32].…”

Section: Non-standard Interactionsmentioning

confidence: 99%

Novel constraints on neutrino physics beyond the standard model from the CONUS experiment

Bonet,

Bonhomme,

Buck

et al. 2021

Preprint

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The measurements of coherent elastic neutrino-nucleus scattering (CEνNS) experiments have opened up the possibility to constrain neutrino physics beyond the standard model of elementary particle physics. Furthermore, by considering neutrinoelectron scattering in the keV-energy region, it is possible to set additional limits on new physics processes. Here, we present constraints that are derived from Conus germanium data on beyond the standard model (BSM) processes like tensor and vector non-standard interactions (NSIs) in the neutrino-quark sector, as well as light vector and scalar mediators. Thanks to the realized low background levels in the Conus experiment at ionization energies below 1 keV, we are able to set the world's best limits on tensor NSIs from CEνNS and constrain the scale of corresponding new physics to lie above 360 GeV. For vector NSIs, the derived limits strongly depend on the assumed ionization quenching factor within the detector material, since small quenching factors largely suppress potential signals for both, the expected standard model CEνNS process and the vector NSIs. Furthermore, competitive limits on scalar and vector mediators are obtained from the CEνNS channel at reactor-site which allow to probe coupling constants as low as 5 • 10 −5 of low mediator masses, assuming the currently favored quenching factor regime. The consideration of neutrino-electron scatterings allows to set even stronger constraints for mediator masses below ∼ 1 MeV and ∼ 10 MeV for scalar and vector mediators, respectively.

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“…The collision-term integral has been extensively studied since the 1990s [47][48][49][50][51] for neutrino physics as it is essential for a precise prediction of the effective number of neutrino species in the early universe. Based on these previous efforts, we briefly show the our strategy for numerically calculating the collision terms needed in this work in this appendix.…”

Section: A Derivation Of Collision Terms In Boltzmann Equationmentioning

confidence: 99%

Revisiting Dark Matter Freeze-in and Freeze-out through Phase-Space Distribution

Du,

Huang,

et al. 2021

Preprint

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We revisit dark-matter production through freeze-in and freeze-out by solving the Boltzmann equations at the level of the phase-space distribution f (p, t). Using the 2 → 2 annihilation and the 1 → 2 decay processes for illustration, we compare the resulting dark-matter relic abundance with that from the number-density approach. In the transition regime between freeze-in and freeze-out, we find the difference can be as large as ∼10% for 2 → 2 and ∼50% for 1 → 2, or even a factor of O(10) if the annihilation of dark-matter particles or the decaying mediator is neglected. The freeze-in production in the 2 → 2 and the 1 → 2 processes can also result in non-thermal phase-space distributions, or even multimodal ones with out-of-equilibrium decay, which can potentially affect structure formation at late times. We also investigate how elastic scatterings can distort such non-thermal distributions.

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Neutrino non-standard interactions meet precision measurements of Neff

Cited by 36 publications

References 153 publications

The Forward Physics Facility: Sites, Experiments, and Physics Potential

The Forward Physics Facility: Sites, Experiments, and Physics Potential

Novel constraints on neutrino physics beyond the standard model from the CONUS experiment

Revisiting Dark Matter Freeze-in and Freeze-out through Phase-Space Distribution

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