Astrophysical constraints from synchrotron emission on very massive decaying dark matter

Abstract

If the cosmological dark matter (DM) couples to Standard Model (SM) fields, it can decay promptly to SM states in a highly energetic hard process, which subsequently showers and hadronizes to give stable particles including $e^{\pm }$, $\gamma$, $p^{\pm }$ and $\nu \bar{\nu }$ at lower energy. If the DM particle is very heavy, the high-energy $e^{\pm }$, due to the Klein-Nishina cross section suppression, preferentially lose energy via synchrotron emission which, in turn, can be of unusually high energies. Here, we present previously unexplored bounds on heavy decaying DM up to the Planck scale, by studying the synchrotron emission from the $e^{\pm }$ produced in the ambient Galactic magnetic field. In particular, we explore the sensitivity of the resulting constraints on the DM decay width to (i) different SM decay channels, to (ii) the Galactic magnetic field configurations, and (iii) to various different DM density profiles proposed in the literature. We find that constraints from the synchrotron component complement and improve on constraints from very high-energy cosmic-ray and gamma-ray observatories targeting the prompt emission when the DM is sufficiently massive, most significantly for masses in excess of $10^{12}\text{ GeV}$.

arXiv comment25 pages, 5 figures. Added comparison of energy losses. Minor edits

References in corpus (53)

• A Universal Density Profile from Hierarchical Clustering
• The Structure of Cold Dark Matter Halos
• The Pierre Auger Cosmic Ray Observatory
• PPPC 4 DM ID: A Poor Particle Physicist Cookbook for Dark Matter Indirect Detection
• Fermi-LAT Observations of the Diffuse Gamma-Ray Emission: Implications for Cosmic Rays and the Interstellar Medium
• A New Model of the Galactic Magnetic Field
• IceCube-Gen2: The Window to the Extreme Universe
• Radio observational constraints on Galactic 3D-emission models
• The Galactic Magnetic Field
• A high performance likelihood reconstruction of gamma-rays for Imaging Atmospheric Cherenkov Telescopes
• Multi-frequency analysis of neutralino dark matter annihilations in the Coma cluster
• Science with the Cherenkov Telescope Array
• A fresh look at linear cosmological constraints on a decaying dark matter component
• Rotation Curve and Mass Distribution in the Galactic Center --- From Black Hole to Entire Galaxy ---
• Gamma-ray Constraints on Decaying Dark Matter and Implications for IceCube
• Testing the Dark Matter Scenario for PeV Neutrinos Observed in IceCube
• Are IceCube neutrinos unveiling PeV-scale decaying dark matter?
• Dark Matter Spectra from the Electroweak to the Planck Scale
• Detecting dark matter WIMPs in the Draco dwarf: a multi-wavelength perspective
• Sensitivity of the Cherenkov Telescope Array to a dark matter signal from the Galactic centre
• Constraining Very Heavy Dark Matter Using Diffuse Backgrounds of Neutrinos and Cascaded Gamma Rays
• Strongest model-independent bound on the lifetime of Dark Matter
• The Galactic halo magnetic field revisited
• Search for neutrinos from decaying dark matter with IceCube
• Limits on the Isotropic Diffuse Flux of Ultrahigh Energy Gamma-Radiation
• Probing Dark Matter Decay and Annihilation with Fermi LAT Observations of Nearby Galaxy Clusters
• Search for dark matter annihilation signals in the H.E.S.S. Inner Galaxy Survey
• Transparency of the Universe to gamma rays
• Constraints on Decaying Dark Matter from the Isotropic Gamma-Ray Background
• Gamma-ray bounds from EAS detectors and heavy decaying dark matter constraints
• Constraints on the diffuse photon flux with energies above $10^{18}$ eV using the surface detector of the Telescope Array experiment
• A Search for Dark Matter in the Galactic Halo with HAWC
• KASCADE-Grande Limits on the Isotropic Diffuse Gamma-Ray Flux between 100 TeV and 1 EeV
• Implications of the Fermi-LAT diffuse gamma-ray measurements on annihilating or decaying Dark Matter
• Probing heavy dark matter decays with multi-messenger astrophysical data
• Comparing Polarised Synchrotron and Thermal Dust Emission in the Galactic Plane
• A search for photons with energies above $2\times 10^{17}$ eV using hybrid data from the low-energy extensions of the Pierre Auger Observatory
• Practical Modeling of Large-Scale Galactic Magnetic Fields: Status and Prospects
• Sensitivity of CTA to dark matter signals from the Galactic Center
• Constraints on heavy decaying dark matter from 570 days of LHAASO observations
• Les Houches Lectures on Indirect Detection of Dark Matter
• Decaying dark matter at IceCube and its signature on High Energy gamma experiments
• Constraints on the flux of $\sim (10^{16}-10^{17.5})$ eV cosmic photons from the EAS-MSU muon data
• Revisiting ultrahigh-energy constraints on decaying super-heavy dark matter
• Constraints on heavy decaying dark matter with current gamma-ray measurements
• PPPC 4 DM secondary: A Poor Particle Physicist Cookbook for secondary radiation from Dark Matter
• Heavy decaying dark matter at future neutrino radio telescopes
• First implications of Tibet AS${}_{\gamma }$ data for heavy dark matter
• Constraining decaying very heavy dark matter from galaxy clusters with 14 year Fermi-LAT data
• Antiprotons from Dark Matter: Effects of a Position-Dependent Diffusion Coefficient
• Constraints on late-forming exploding black holes
• Pierre Auger Observatory and Super Heavy Dark Matter
• Bounds from multi-messenger astronomy on the Super Heavy Dark Matter

Cited by in corpus (3)

• Probing superheavy dark matter through lunar radio observations of ultrahigh-energy neutrinos and the impacts of neutrino cascades
• Composite heavy axion-like dark matter
• LHAASO Galactic Plane $\gamma$-rays Strongly Constrain Heavy Dark Matter