Disentangling Dark Physics with Cosmic Microwave Background Experiments

Abstract

We forecast constraints on dark matter (DM) scattering with baryons in the early Universe with upcoming and future cosmic microwave background (CMB) experiments, for DM particle masses down to 15 keV. In terms of the upper limit on the interaction cross section for a velocity-independent spin-independent elastic scattering, compared to current Planck results, we find a factor of $\sim$6 improvement with CMB-Stage 3, a factor of $\sim$26 with CMB-Stage 4, and a factor of $\sim$200 with a cosmic-variance limited experiment. Once the instrumental noise reaches the proximity of 1 $\mu$K-arcmin, the constraints are entirely driven by the lensing measurements. The constraints benefit from a wide survey, and show gradual improvement for instrumental noise levels from 10 $\mu$K-arcmin to 1 $\mu$K-arcmin and resolution from 5 arcmin to 1 arcmin. We further study degeneracies between DM interactions and various other signatures of new physics targeted by the CMB experiments. In the primary temperature and polarization only, we find moderate degeneracy between the effects of DM scattering, signals from massive neutrinos, and from the effective number of relativistic degrees of freedom. The degeneracy is almost entirely broken once the lensing convergence spectrum is included into the analyses. We discuss the implications of our findings in context of planned and upcoming CMB measurements and other cosmological probes of dark-sector and neutrino physics.

arXiv comment17 pages, 9 figures, 2 tables; key results in figures 3 and 9; comments welcome

References in corpus (55)

• Astropy: A Community Python Package for Astronomy
• Planck 2015 results. XIII. Cosmological parameters
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• Stable clustering, the halo model and nonlinear cosmological power spectra
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Weak Gravitational Lensing of the CMB
• Massive neutrinos and cosmology
• LSST Science Book, Version 2.0
• First Dark Matter Search Results from the XENON1T Experiment
• Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
• Mass Reconstruction with CMB Polarization
• The Effective Field Theory of Dark Matter Direct Detection
• CMB Constraints on WIMP Annihilation: Energy Absorption During the Recombination Epoch
• First Direct Detection Limits on sub-GeV Dark Matter from XENON10
• New Constraints and Prospects for sub-GeV Dark Matter Scattering off Electrons in Xenon
• Signatures of Relativistic Neutrinos in CMB Anisotropy and Matter Clustering
• CMB-S4 Science Book, First Edition
• Results on light dark matter particles with a low-threshold CRESST-II detector
• Cosmic Complementarity: Joint Parameter Estimation from CMB Experiments and Redshift Surveys
• Massive Neutrinos and the Non-linear Matter Power Spectrum
• CMB constraints on Dark Matter models with large annihilation cross-section
• SPT-3G: A Next-Generation Cosmic Microwave Background Polarization Experiment on the South Pole Telescope
• Non-relativistic effective theory of dark matter direct detection
• Constraining Dark Matter-Baryon Scattering with Linear Cosmology
• Dark-Matter Electric and Magnetic Dipole Moments
• How Massless Neutrinos Affect the Cosmic Microwave Background Damping Tail
• The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument
• Low-Mass Dark Matter Search with CDMSlite
• Current Direct Neutrino Mass Experiments
• Towards a cosmological neutrino mass detection
• The Scientific Programme of Planck
• Early-Universe Constraints on Dark Matter-Baryon Scattering and their Implications for a Global 21cm Signal
• Searching for Dark Matter in the CMB: A Compact Parameterization of Energy Injection from New Physics
• Current Dark Matter Annihilation Constraints from CMB and Low-Redshift Data
• Probing sub-GeV Dark Matter-Baryon Scattering with Cosmological Observables
• Constraints on scattering of keV--TeV dark matter with protons in the early Universe
• Snowmass CF1 Summary: WIMP Dark Matter Direct Detection
• A Guide to Designing Future Ground-based CMB Experiments
• Constraining Neutrino Masses by CMB Experiments Alone
• Cosmic microwave background and large scale structure limits on the interaction between dark matter and baryons
• Limits on Dark Radiation, Early Dark Energy, and Relativistic Degrees of Freedom
• Searching for Light Relics with Large-Scale Structure
• Mitigating Foreground Biases in CMB Lensing Reconstruction Using Cleaned Gradients
• First Cosmological Constraint on the Effective Theory of Dark Matter-Proton Interactions
• Full covariance of CMB and lensing reconstruction power spectra
• A Window in the Dark Matter Exclusion Limits
• DaMaSCUS: The Impact of Underground Scatterings on Direct Detection of Light Dark Matter
• On the joint analysis of CMB temperature and lensing-reconstruction power spectra
• Non-Gaussian structure of the lensed CMB power spectra covariance matrix
• CMB photons shedding light on dark matter
• Fisher Matrices and Confidence Ellipses: A Quick-Start Guide and Software
• Fundamental Physics from Future Weak-Lensing Calibrated Sunyaev-Zel'dovich Galaxy Cluster Counts
• Closing the window on $\sim$GeV Dark Matter with moderate ($\sim$$\mu$b) interaction with nucleons
• Dark Matter Searches with LUX
• Optimal prior for Bayesian inference in a constrained parameter space

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• CMB-S4 Science Case, Reference Design, and Project Plan
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• Observational constraints on dark matter scattering with electrons
• Bounds on velocity-dependent dark matter-proton scattering from Milky Way satellite abundance
• Hints of dark matter-neutrino interactions in Lyman-$\alpha$ data
• Strategies to Detect Dark-Matter Decays with Line-Intensity Mapping
• CMB lensing power spectrum estimation without instrument noise bias
• Boltzmann-Fokker-Planck formalism for dark-matter--baryon scattering
• Baryonic effects on CMB lensing and neutrino mass constraints
• Ultra-light axions and the kinetic Sunyaev-Zel'dovich Effect
• Avoiding baryonic feedback effects on neutrino mass measurements from CMB lensing
• The Atacama Cosmology Telescope: limits on dark matter-baryon interactions from DR4 power spectra
• Exact treatment of weak dark matter-baryon scattering for linear-cosmology observables
• Science from an Ultra-Deep, High-Resolution Millimeter-Wave Survey
• The Glow of Axion Quark Nugget Dark Matter: (I) Large Scale Structures
• CMB lensing power spectrum without noise bias
• Numerical solution of the exact background collisional Boltzmann equation for dark matter-baryon scattering
• Sensitivity of the Global 21-cm Signal to Dark Matter-Baryon Scattering
• CMB-HD: An Ultra-Deep, High-Resolution Millimeter-Wave Survey Over Half the Sky
• Forecasting 21-cm power spectrum sensitivity to dark Matter-baryon scattering
• Testing the coupling of dark radiations in light of the Hubble tension
• CMB Constraints on Loop-Induced Decays of Leptophilic Dark Matter
• Forecasting Constraints on Non-Thermal Light Massive Relics from Future CMB Experiments (CMB-S4/Simons Observatory)