The 7 keV axion dark matter and the X-ray line signal

Abstract

We propose a scenario where the saxion dominates the energy density of the Universe and reheats the standard model sector via the dilatonic coupling, while its axionic partner contributes to dark matter decaying into photons via the same operator in supersymmetry. Interestingly, for the axion mass $m_a\simeq 7$keV and the decay constant $f_a\simeq 10^{14-15}$GeV, the recently discovered X-ray line at $3.5$keV in the XMM Newton X-ray observatory data can be explained. We discuss various cosmological aspects of the $7$keV axion dark matter such as the production of axion dark matter, the saxion decay process, hot dark matter and isocurvature constraints on the axion dark matter, and the possible baryogenesis scenarios.

arXiv comment20 pages, 1 figure. v2: references added

References in corpus (59)

• de Sitter Vacua in String Theory
• Systematics of Moduli Stabilisation in Calabi-Yau Flux Compactifications
• Four-dimensional String Compactifications with D-Branes, Orientifolds and Fluxes
• WISPy Cold Dark Matter
• Flux Compactification
• Flux compactifications in string theory: a comprehensive review
• Baryogenesis from Flat Directions of the Supersymmetric Standard Model
• The role of sterile neutrinos in cosmology and astrophysics
• MeV-scale Reheating Temperature and Thermalization of Neutrino Background
• Soft Supersymmetry Breaking in KKLT Flux Compactification
• Massive sterile neutrinos as warm Dark Matter
• Cosmological Constraints on Late-time Entropy Production
• Sterile neutrinos: the dark side of the light fermions
• The QCD Axion and Moduli Stabilisation
• The Phenomenology of Right Handed Neutrinos
• Stability of flux compactifications and the pattern of supersymmetry breaking
• Evidence for massive neutrinos from CMB and lensing observations
• Phenomenology of Mixed Modulus-Anomaly Mediation in Fluxed String Compactifications and Brane Models
• $\nu \Lambda$CDM: Neutrinos help reconcile Planck with the Local Universe
• Moduli-Induced Gravitino Problem
• Dark Matter Axions Revisited
• Gravitino Production from Heavy Moduli Decay and Cosmological Moduli Problem Revived
• Bottom-Up Approach to Moduli Dynamics in Heavy Gravitino Scenario : Superpotential, Soft Terms and Sparticle Mass Spectrum
• The oscillation effects on thermalization of the neutrinos in the universe with low reheating temperature
• Moduli Decays and Gravitinos
• Thermal axion production
• On Volume Stabilization by Quantum Corrections
• Neutrinos And Big Bang Nucleosynthesis
• On Axion Thermalization in the Early Universe
• Cosmological Implications of Radiatively Generated Axion Scale
• A new life for sterile neutrinos: resolving inconsistencies using hot dark matter
• Thermal axion production in the primordial quark-gluon plasma
• Moduli/Inflaton Mixing with Supersymmetry Breaking Field
• Relaxing the Cosmological Moduli Problem
• keV Neutrino Model Building
• Increasing the effective number of neutrinos with decaying particles
• Isocurvature Constraints and Anharmonic Effects on QCD Axion Dark Matter
• Moduli-Induced Axion Problem
• Cosmological Moduli Problem in Gauge-mediated Supersymmetry Breaking Theories
• Suppressing Isocurvature Perturbations of QCD Axion Dark Matter
• On the Adiabatic Solution to the Polonyi/Moduli Problem
• Non-thermal Production of Dark Matter from Late-Decaying Scalar Field at Intermediate Scale
• String theoretic QCD axion with stabilized saxion and the pattern of supersymmetry breaking
• Moduli dark matter and the search for its decay line using Suzaku X-ray telescope
• The abundance of relativistic axions in a flaton model of Peccei-Quinn symmetry
• Cosmological Constraint on the String Dilaton in Gauge-mediated Supersymmetry Breaking Theories
• Spectrum of Background X-rays from Moduli Dark Matter
• Note on moduli stabilization, supersymmetry breaking and axiverse
• Light Higgsino from Axion Dark Radiation
• Axions and saxions from the primordial supersymmetric plasma and extra radiation signatures
• Dark radiation and small-scale structure problems with decaying particles
• Cosmological Moduli Problem in Low Cutoff Theory
• Gravity mediation without a Polonyi problem
• Dark radiation and dark matter in supersymmetric axion models with high reheating temperature
• On the Moduli Problem and Baryogenesis in Gauge-mediated SUSY Breaking Models
• Axions as Hot and Cold Dark Matter
• Strong dynamics at the Planck scale as a solution to the cosmological moduli problem
• Moduli-induced Baryogenesis
• Axionic Co-genesis of Baryon, Dark Matter and Dark Radiation

Cited by in corpus (84)

• WIMP dark matter candidates and searches - current status and future prospects
• Dark matter direct-detection experiments
• Dark matter production in the early Universe: beyond the thermal WIMP paradigm
• Physics potential of the International Axion Observatory (IAXO)
• Checking the dark matter origin of 3.53 keV line with the Milky Way center
• New Constraints on Sterile Neutrino Dark Matter from $NuSTAR$ M31 Observations
• Discovery of a 3.5 keV line in the Galactic Center and a Critical Look at the Origin of the Line Across Astronomical Targets
• New axion and hidden photon constraints from a solar data global fit
• The Quest for an Intermediate-Scale Accidental Axion and Further ALPs
• A 3.55 keV hint for decaying axion-like particle dark matter
• A deep search for decaying dark matter with XMM-Newton blank-sky observations
• Cold keV dark matter from decays and scatterings
• A 3.55 keV Photon Line and its Morphology from a 3.55 keV ALP Line
• NuSTAR Tests of Sterile-Neutrino Dark Matter: New Galactic Bulge Observations and Combined Impact
• Where do the 3.5 keV photons come from? A morphological study of the Galactic Center and of Perseus
• Multi-Natural Inflation in Supergravity
• Generating X-ray lines from annihilating dark matter
• X-ray Lines from Dark Matter: The Good, The Bad, and The Unlikely
• Quality of the Peccei-Quinn symmetry in the Aligned QCD Axion and Cosmological Implications
• 3.5 keV X-rays as the "21 cm line" of dark atoms, and a link to light sterile neutrinos
• 3.55 keV photon lines from axion to photon conversion in the Milky Way and M31
• X-ray lines from R-parity violating decays of keV sparticles
• 7 keV Scalar Dark Matter and the Anomalous Galactic X-ray Spectrum
• Anomaly-free flavor models for Nambu-Goldstone bosons and the 3.5 keV X-ray line signal
• 3.5 keV x-ray line from decaying gravitino dark matter
• Cold light dark matter in extended seesaw models
• Constraints on light decaying dark matter candidates from 16 years of INTEGRAL/SPI observations
• keV Photon Emission from Light Nonthermal Dark Matter
• A Fresh Look at keV Sterile Neutrino Dark Matter from Frozen-In Scalars
• Cosmic Birefringence Triggered by Dark Matter Domination
• 3.5 keV X-ray Line Signal from Decay of Right-Handed Neutrino due to Transition Magnetic Moment
• X-ray line in Radiative Neutrino Model with Global $U(1)$ Symmetry
• Scale-invariant scalar field dark matter through the Higgs portal
• A Dynamical Framework for KeV Dirac Neutrino Warm Dark Matter
• Searches for sterile neutrinos and axionlike particles from the Galactic halo with eROSITA
• Dark Matter Velocity Spectroscopy
• Magnetic dark matter for the X-ray line at 3.55 keV
• The 3.5 keV X-ray line signal from decaying moduli with low cutoff scale
• Cluster X-ray line at $3.5\mathrm{keV}$ from axion-like dark matter
• Return of the X-rays: A New Hope for Fermionic Dark Matter at the keV Scale
• Hidden axion dark matter decaying through mixing with QCD axion and the 3.5 keV X-ray line
• SUSY in the sky or a keV signature of sub-GeV gravitino dark matter
• 7 keV Sterile neutrino dark matter in $U(1{)}_R-$ lepton number model
• Decaying Vector Dark Matter as an Explanation for the 3.5 keV Line from Galaxy Clusters
• Nonabelian dark matter models for 3.5 keV X-rays
• 3.5-keV X-ray line from nearly-degenerate WIMP dark matter decays
• Can a millicharged dark matter particle emit an observable gamma-ray line?
• Scalar field dark matter with spontaneous symmetry breaking and the $3.5$ keV line
• X-ray Line from the Dark Transition Electric Dipole
• Exploring X-Ray Lines as Scotogenic Signals
• Effective field theory and keV lines from dark matter
• Relaxing Isocurvature Bounds on String Axion Dark Matter
• Displaced Vertices from X-ray Lines
• Non-abelian Dark Matter Solutions for Galactic Gamma-ray Excess and Perseus 3.5 keV X-ray Line
• 3.55 keV line in Minimal Decaying Dark Matter scenarios
• Explaining the 3.5 keV X-ray Line in a $L_{\mu }-L_{\tau }$ Extension of the Inert Doublet Model
• A Couplet from Flavored Dark Matter
• Testing the Minimal Direct Gauge Mediation at the LHC
• 3.5 keV X-ray line and R-Parity Conserving Supersymmetry
• New Atomic probes for Dark Matter detection: Axions, Axion-like particles and Topological Defects
• Axion-photon Propagation in Magnetized Universe
• Common Origin of 3.55 keV X-Ray Line and Galactic Center Gamma Ray Excess in a Radiative Neutrino Mass Model
• ${\nu }_R$ dark matter-philic Higgs for 3.5 keV X-ray signal
• Observational consistency and future predictions for a 3.5 keV ALP to photon line
• Linking axionlike dark matter to neutrino masses
• Structure formation in a mixed dark matter model with decaying sterile neutrino: the 3.5 keV X-ray line and the Galactic substructure
• 3.5 keV Galactic Emission Line as a Signal from the Hidden Sector
• Polarization of photons emitted by decaying dark matter
• Revisiting the Number-Theory Dark Matter Scenario and the Weak Gravity Conjecture
• Common Origin of $3.55$ keV X-ray line and Gauge Coupling Unification with Left-Right Dark Matter
• Anomaly-free axion dark matter in three Higgs doublet model and its phenomenological implications
• Anomalous X-Ray Galactic signal from 7 keV spin-$3/2$ dark matter decay
• A keV String Axion from High Scale Supersymmetry
• Axion Like Particles and the Inverse Seesaw Mechanism
• A sensitive search for unknown spectral emission lines in the diffuse X-ray background with XMM-Newton
• Curvaton as dark matter with secondary inflation
• Supersymmetric Higgs-portal and X-ray lines
• 3.5 keV X-ray Line Signal from Dark Matter Decay in Local $U(1{)}_{B-L}$ Extension of Zee-Babu Model
• Testing the axion-conversion hypothesis of 3.5 keV emission with polarization
• 7 keV sterile neutrino Dark Matter in extended seesaw framework
• New emission line at ~3.5 keV - observational status, connection with radiatively decaying dark matter and directions for future studies
• Unlocking Discovery Potential for Decaying Dark Matter and Faint X-ray Sources with XRISM
• Searching for Particle Dark Matter with eROSITA Early Data
• Intermediate Scale Accidental Axion and ALPs