keV Sterile Neutrino Dark Matter from Singlet Scalar Decays: Basic Concepts and Subtle Features

Abstract

We perform a detailed and illustrative study of the production of keV sterile neutrino Dark Matter (DM) by decays of singlet scalars in the early Universe. In the current study we focus on providing a clear and general overview of this production mechanism. For the first time we study all regimes possible on the level of momentum distribution functions, which we obtain by solving a system of Boltzmann equations. These quantities contain the full information about the production process, which allows us to not only track the evolution of the DM generation but to also take into account all bounds related to the spectrum, such as constraints from structure formation or from avoiding too much dark radiation. In particular we show that this simple production mechanism can, depending on the regime, lead to strongly non-thermal DM spectra which may even feature more than one peak in the momentum distribution. These cases could have particularly interesting consequences for cosmological structure formation, as their analysis requires more refined tools than the simplistic estimate using the free-streaming horizon. Here we present the mechanism including all concepts and subtleties involved, for now using the assumption that the effective number of relativistic degrees of freedom is constant during DM production, which is applicable in a significant fraction of the parameter space. This allows us to derive analytical results to back up our detailed numerical computations, thus leading to the most comprehensive picture of keV sterile neutrino DM production by singlet scalar decays that exists up to now.

arXiv commentv3: 49 pages, 10 figures, content matches published version

References in corpus (75)

• A Universal Density Profile from Hierarchical Clustering
• Planck 2013 results. XVI. Cosmological parameters
• Where are the missing galactic satellites?
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• First results from the LUX dark matter experiment at the Sanford Underground Research Facility
• Sterile Neutrinos as Dark Matter
• Dark Matter Results from 225 Live Days of XENON100 Data
• Freeze-In Production of FIMP Dark Matter
• Constraining Warm Dark Matter candidates including sterile neutrinos and light gravitinos with WMAP and the Lyman-alpha forest
• A New Dark Matter Candidate: Non-thermal Sterile Neutrinos
• Detection of An Unidentified Emission Line in the Stacked X-ray spectrum of Galaxy Clusters
• The Milky Way's bright satellites as an apparent failure of LCDM
• An unidentified line in X-ray spectra of the Andromeda galaxy and Perseus galaxy cluster
• MeV-scale Reheating Temperature and Thermalization of Neutrino Background
• Neutrinos in cosmology
• Big Bang nucleosynthesis and physics beyond the Standard Model
• What is the lowest possible reheating temperature?
• Search for Low-Mass WIMPs with SuperCDMS
• Thermally Generated Gauge Singlet Scalars as Self-Interacting Dark Matter
• Substructure and halo density profiles in a Warm Dark Matter Cosmology
• New BBN limits on Physics Beyond the Standard Model from He4
• Lyman-alpha constraints on warm and on warm-plus-cold dark matter models
• The $\nu$MSM, Inflation, and Dark Matter
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Axions as Dark Matter Particles
• Precision measures of the primordial abundance of deuterium
• Dark Matter, Baryogenesis and Neutrino Oscillations from Right Handed Neutrinos
• Status of the Higgs Singlet Extension of the Standard Model after LHC Run 1
• Axion Cosmology Revisited
• Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector
• A lower bound on the mass of Dark Matter particles
• A new determination of the primordial He abundance using the HeI 10830A emission line: cosmological implications
• Dark Radiation constraints on minicharged particles in models with a hidden photon
• Large Scale Structure Tests of Warm Dark Matter
• keV sterile neutrino dark matter in gauge extensions of the standard model
• Light inflaton Hunter's Guide
• A robust upper limit on N_eff from BBN, circa 2011
• Evading the cosmological domain wall problem
• Gravitino Dark Matter and Cosmological Constraints
• Warm Dark Matter in Low Scale Left-Right Theory
• Non-Thermal Production of WIMPs and the Sub-Galactic Structure of the Universe
• Results on low mass WIMPs using an upgraded CRESST-II detector
• Constraints on 3.55 keV line emission from stacked observations of dwarf spheroidal galaxies
• Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
• New Production Mechanism for keV Sterile Neutrino Dark Matter by Decays of Frozen-In Scalars
• Delta r and the W-boson mass in the Singlet Extension of the Standard Model
• The dark matter halos of dwarf galaxies: a challenge for the LCDM paradigm?
• keV Neutrino Model Building
• Big bang nucleosynthesis limit on N_nu
• IS THERE A DOMAIN WALL PROBLEM?
• Non-Thermal Dark Matter Mimicking An Additional Neutrino Species In The Early Universe
• BBN For Pedestrians
• New Neutrino Mass Bounds from Sloan Digital Sky Survey III Data Release 8 Photometric Luminous Galaxies
• Dark Radiation Emerging After Big Bang Nucleosynthesis?
• A Dark Matter Progenitor: Light Vector Boson Decay into (Sterile) Neutrinos
• Clustering properties of a sterile neutrino dark matter candidate
• Dark Matter in the minimal Inverse Seesaw mechanism
• Small-scale structure formation properties of chilled sterile neutrinos as dark matter
• The Nonlinear Cosmological Matter Power Spectrum with Massive Neutrinos I: The Halo Model
• Dark Radiation from Particle Decays during Big Bang Nucleosynthesis
• Nonrestoration of spontaneously broken P, CP and PQ at high temperature
• Dark Radiation or Warm Dark Matter from long lived particle decays in the light of Planck
• Dark radiation from the axino solution of the gravitino problem
• Sterile Neutrino Dark Matter and Low Scale Leptogenesis from a Charged Scalar
• Cosmological Limits on Hidden Sector Dark Matter
• Review of axino dark matter
• A Fresh Look at keV Sterile Neutrino Dark Matter from Frozen-In Scalars
• Warm Dark Matter from keVins
• The Cosmic Time in Terms of the Redshift
• Low-Scale Leptogenesis and the Domain Wall Problem in Models with Discrete Flavor Symmetries
• Cosmological Implications of Light Sterile Neutrinos produced after the QCD Phase Transition
• Mirror dark matter cosmology - predictions for $N_{eff}[CMB]$ and $N_{eff}[BBN]$
• Influence of a keV sterile neutrino on neutrino-less double beta decay -- how things changed in the recent years
• Boltzmann equation for non-equilibrium particles and its application to non-thermal dark matter production

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• New Constraints on Sterile Neutrino Dark Matter from $NuSTAR$ M31 Observations
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• Constraints on Decaying Dark Matter from the Isotropic Gamma-Ray Background
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• Singlet-Doublet Dark Matter Freeze-in: LHC displaced signatures versus cosmology
• Freeze-in Production of Sterile Neutrino Dark Matter in U(1)${}_{\mathrm{B}-\mathrm{L}}$ Model
• Two component WIMP-FImP dark matter model with singlet fermion, scalar and pseudo scalar
• Fundamental physics with the Hubble Frontier Fields: constraining Dark Matter models with the abundance of extremely faint and distant galaxies
• On UltraViolet Freeze-in Dark Matter during Reheating
• Improved Limits on Sterile Neutrino Dark Matter using Full-Sky Fermi Gamma-Ray Burst Monitor Data
• Fermionic WIMPs and Vacuum Stability in the Scotogenic Model
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• PeV Neutrinos and a 3.5 keV X-Ray Line from a PeV Scale Supersymmetric Neutrino Sector
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• Neutrino dark matter and the Higgs portal: improved freeze-in analysis
• Cold light dark matter in extended seesaw models
• Neutrino Masses and Sterile Neutrino Dark Matter from the PeV Scale
• A UV Complete Framework of Freeze-in Massive Particle Dark Matter
• A consistent model for leptogenesis, dark matter and the IceCube signal
• Real scalar phase transitions: a nonperturbative analysis
• Thermalizing sterile neutrino dark matter
• Shining Light on the Scotogenic Model: Interplay of Colliders and Cosmology
• Non-thermal leptogenesis and UV freeze-in of dark matter: impact of inflationary reheating
• Constraining FIMP from the structure formation of the Universe: analytic mapping from $m_{\mathrm{WDM}}$
• Calculation of Momentum Distribution Function of a Non-thermal Fermionic Dark Matter
• A new life for sterile neutrino dark matter after the pandemic
• Warm Dark Matter via Ultra-Violet Freeze-In: Reheating Temperature and Non-Thermal Distribution for Fermionic Higgs Portal Dark Matter
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• Searching for Sterile Neutrino with X-ray Intensity Mapping
• Two-component Dark Matter with co-genesis of Baryon Asymmetry of the Universe
• Two Component Feebly Interacting Massive Particle (FIMP) Dark Matter
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• Galaxy Formation in Sterile Neutrino Dark Matter Models
• Sterile Neutrino Dark Matter with Supersymmetry
• A Minimal Model For Two-Component FIMP Dark Matter: A Basic Search
• Momentum distributions of cosmic relics: Improved analysis
• Precision calculations of dark matter relic abundance
• Neutrino Mass, Leptogenesis and FIMP Dark Matter in a $\mathrm{U}(1{)}_{\mathrm{B}-\mathrm{L}}$ Model
• The Effect of Thermal Velocities on Structure Formation in N-body Simulations of Warm Dark Matter
• Cosmological Imprints of Frozen-In Light Sterile Neutrinos
• Production of heavy sterile neutrinos from vector boson decay at electroweak temperatures
• Impact of dark matter self-scattering on its relic abundance
• Simple estimate of BBN sensitivity to light freeze-in dark matter
• Exotic Sterile Neutrinos and Pseudo-Goldstone Phenomenology
• Dark matter and observable Lepton Flavour Violation
• On the applicability of approximations used in calculation of spectrum of Dark Matter particles produced in particle decays
• Dark Photon Dark Matter in the minimal $B-L$ Model
• Constraining structure formation using EDGES
• Higgs sector extension of the neutrino minimal standard model with thermal freeze-in production mechanism
• Demystifying Freeze-In Dark Matter at the LHC
• The case for mixed dark matter from sterile neutrinos
• Roles of sterile neutrinos in particle physics and cosmology
• Nonlinear growth of structure in cosmologies with damped matter fluctuations
• Relativistic Freeze-in with Scalar Dark Matter in a Gauged $B-L$ Model and Electroweak Symmetry Breaking
• Sterile neutrino dark matter from right-handed neutrino oscillations
• Secluded Dark Matter in Gauged $B-L$ Model
• Twin Sterile Neutrino Dark Matter
• Dark Matter Freeze-In with a Heavy Mediator: Beyond the EFT Approach
• keV Sterile Neutrino Dark Matter and Low Scale Leptogenesis
• Freeze-in and freeze-out of sterile neutrino dark matter
• N-body simulations of structure formation in thermal inflation cosmologies
• Fingerprint matching of beyond-WIMP dark matter: neural network approach
• Observing the very low-surface brightness dwarfs in a deep field in the VIRGO cluster: constraints on Dark Matter scenarios
• Freeze-in and freeze-out production of Higgs portal Majorana fermionic dark matter during and after reheating
• The Upper Bound of the Second Higgs Boson Mass in Minimal Gauge Mediation with the Gravitino Warm Dark Matter
• Heavy Light Inflaton and Dark Matter Production
• Sterile neutrino Dark Matter in the minimal Dirac Seesaw