Anticipating the XRISM search for the decay of resonantly produced sterile neutrino dark matter

Abstract

The sterile neutrino ($N_1$) features in multiple extensions of the standard model and is a compelling dark matter candidate, especially as the decay of $N_1$ with mass $m_{\mathrm{s}}=7.1\mathrm{keV}$ is a possible source for the unexplained $3.55\mathrm{keV}$ X-ray line reported in galaxy clusters. This particle will be accessible to the XRISM X-ray mission over the next 12 months. We revisit the physics behind $N_1$ and the uncertainty in its parameters. We compare predictions for the $m_s=7.1\mathrm{keV}$ $N_1$ mixing angle, ${\sin }^2(2\theta )$, and half-mode mass, $M_{\mathrm{hm}}$, as described in the $\nu$MSM standard model extension to existing X-ray observations and structure formation constraints. The strongest available constraints rule out $N_1$ as a dark matter candidate, and a more optimistic reading of the data prefers ${\sin }^2(2\theta )=5\times 10^{-11}$ and $M_{\mathrm{hm}}=3.5\times 10^8{M}_{\odot }$. We highlight that the most promising upcoming opportunity for a detection is to find a line of velocity dispersion $\sim 500{\mathrm{kms}}^{-1}$ in the Virgo cluster with XRISM, and then draw up a list of future objects of study to determine: (i) whether the line is from dark matter generally, and (ii) if from dark matter, whether that candidate is indeed $N_1$.

13 pages, 6 figures. Accepted version. Identified error in previous version for CLASS calculation, corrected in this version. Contact: [email protected]

References in corpus (44)

• Too big to fail? The puzzling darkness of massive Milky Way subhaloes
• The Reactor Antineutrino Anomaly
• Sterile neutrinos, dark matter, and the pulsar velocities in models with a Higgs singlet
• Sterile Neutrinos as the Origin of Dark and Baryonic Matter
• Sterile neutrino dark matter as a consequence of nuMSM-induced lepton asymmetry
• Constraints on the Dark Matter Particle Mass from the Number of Milky Way Satellites
• Realistic sterile neutrino dark matter with keV mass does not contradict cosmological bounds
• Refined Bounds on MeV-scale Thermal Dark Sectors from BBN and the CMB
• Discovery of a 3.5 keV line in the Galactic Center and a Critical Look at the Origin of the Line Across Astronomical Targets
• Resonantly-Produced 7 keV Sterile Neutrino Dark Matter Models and the Properties of Milky Way Satellites
• Prospects for Beyond the Standard Model Physics Searches at the Deep Underground Neutrino Experiment
• Hitomi constraints on the 3.5 keV line in the Perseus galaxy cluster
• Joint constraints on thermal relic dark matter from strong gravitational lensing, the Lyman-$\alpha$ forest, and Milky Way satellites
• Dark Matter Constraints from a Unified Analysis of Strong Gravitational Lenses and Milky Way Satellite Galaxies
• Constraints on the properties of warm dark matter using the satellite galaxies of the Milky Way
• New Constraints on Warm Dark Matter from the Lyman-$\alpha$ Forest Power Spectrum
• BBN constraints on the annihilation of MeV-scale dark matter
• Long-Exposure NuSTAR Constraints on Decaying Dark Matter in the Galactic Halo
• A lensed radio jet at milli-arcsecond resolution II: Constraints on fuzzy dark matter from an extended gravitational arc
• Warm Dark Matter Constraints Using Milky-Way Satellite Observations and Subhalo Evolution Modeling
• Laboratory measurements compellingly support charge-exchange mechanism for the 'dark matter' $\sim$3.5 keV X-ray line
• Detection of Strong Epicyclic Density Spikes in the GD-1 Stellar Stream. An Absence of Evidence for the Influence of Dark Matter Subhalos?
• First constraints on light sterile neutrino oscillations from combined appearance and disappearance searches with the MicroBooNE detector
• The Inverse Seesaw in Conformal Electro-Weak Symmetry Breaking and Phenomenological Consequences
• Constraints on sterile neutrino models from strong gravitational lensing, Milky Way satellites, and Lyman-$\alpha$ forest
• Constraints on warm dark matter from UV luminosity functions of high-z galaxies with Bayesian model comparison
• JWST high-z galaxy constraints on warm and cold dark matter models
• A 3.55 keV line from $\text{DM}\to a\to \gamma$: predictions for cool-core and non-cool-core clusters
• Sensitivity of strong lensing observations to dark matter substructure: a case study with Euclid
• LYRA III: The smallest Reionization survivors
• The spatial distribution of Milky Way satellites, gaps in streams and the nature of dark matter
• What does cosmology tell us about the mass of thermal-relic dark matter?
• 7.1 keV sterile neutrino dark matter constraints from a deep Chandra X-ray observation of the Galactic bulge Limiting Window
• Detailed Design of the Science Operations for the XRISM mission
• ETHOS - an effective theory of structure formation: formation of the first haloes and their stars
• Technical Comment on "The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations"
• Response to a comment on Dessert et al. "The dark matter interpretation of the 3.5 keV line is inconsistent with blank-sky observations"
• Fuzzy Aquarius: evolution of a Milky-way like system in the Fuzzy Dark Matter scenario
• Matching the mass function of Milky Way satellites in competing dark matter models
• Exploiting flux ratio anomalies to probe warm dark matter in future large scale surveys
• Constraining Sterile Neutrino Dark Matter in the Milky Way Halo with Swift-XRT
• The feasibility of constraining DM interactions with high-redshift observations by JWST
• Simulating the dark matter decay signal from the Perseus galaxy cluster
• Entering the Era of Measuring Sub-Galactic Dark Matter Structure: Accurate Transfer Functions for Axino, Gravitino & Sterile Neutrino Thermal Warm Dark Matter

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