Boosting Asymmetric Charged DM via Thermalization

Abstract

We consider a dark sector scenario with two dark matter species with opposite dark $U(1)$ charges and an asymmetric population comprising some fraction of the dark matter abundance. A new mechanism for boosting dark matter is introduced, arising from the large mass hierarchy between the two particles. In the galaxy, the two species thermalize efficiently through dark Rutherford scattering greatly boosting the lighter dark matter particle, far above the virial and escape velocities in the galaxy, while the dark charge prevents it from escaping. We study the consequences of this scenario for direct-detection experiments, assuming a kinetic mixing between the dark photon and the photon. If the charged dark sector makes up 5% of the total DM mass in our galaxy and the mass ratio is between $10^3-10^4$, we find that current and future experiments may probe the boosted light dark matter for masses down to 100 keV, in a hitherto unexplored parameter range.

arXiv comment26 pages, 8 figures

References in corpus (49)

• The Structure of Cold Dark Matter Halos
• The Structure of Dark Matter Haloes in Dwarf Galaxies
• New CAST Limit on the Axion-Photon Interaction
• Dark Matter Results From 54-Ton-Day Exposure of PandaX-II Experiment
• The Diversity and Similarity of Simulated Cold Dark Matter Halos
• Constraints on the Self-Interaction Cross-Section of Dark Matter from Numerical Simulations of the Merging Galaxy Cluster 1E 0657-5
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• A SQUID-based microwave cavity search for dark-matter axions
• Weak lensing mass reconstruction of the interacting cluster 1E0657-558: Direct evidence for the existence of dark matter
• Supernova 1987A Constraints on Sub-GeV Dark Sectors, Millicharged Particles, the QCD Axion, and an Axion-like Particle
• The Local Dark Matter Density
• Hidden Charged Dark Matter
• SENSEI: Direct-Detection Results on sub-GeV Dark Matter from a New Skipper-CCD
• Dark Matter and Dark Radiation
• New Constraints and Prospects for sub-GeV Dark Matter Scattering off Electrons in Xenon
• The Universal Rotation Curve of Spiral Galaxies. II The Dark Matter Distribution out to the Virial Radius
• The Dark Matter Halo of the Milky Way, AD 2013
• Novel direct detection constraints on light dark matter
• Double-Disk Dark Matter
• Constraints on Light Dark Matter Particles Interacting with Electrons from DAMIC at SNOLAB
• Turning off the Lights: How Dark is Dark Matter?
• Dark Radiation constraints on minicharged particles in models with a hidden photon
• (In)direct Detection of Boosted Dark Matter
• Light Dark Matter at Neutrino Experiments
• A Dark-Disk Universe
• The Shape and Profile of the Milky Way Halo as Seen by the CFHT Legacy Survey
• Is there a supernova bound on axions?
• Search for axionlike dark matter with a liquid-state nuclear spin comagnetometer
• Reviving Millicharged Dark Matter for 21-cm Cosmology
• Directly Detecting MeV-scale Dark Matter via Solar Reflection
• Reopening the window on charged dark matter
• Constraining Dissipative Dark Matter Self-Interactions
• Strong New Limits on Light Dark Matter from Neutrino Experiments
• Make Dark Matter Charged Again
• Formation and Evolution of the Self-Interacting Dark Matter Halos
• Exothermic Double-Disk Dark Matter
• The Sun as a sub-GeV Dark Matter Accelerator
• Highly-boosted dark matter and cutoff for cosmic-ray neutrino through neutrino portal
• Evidence for Dark Matter Self-Interactions via Collisionless Shocks in Cluster Mergers
• CHAMP Cosmic Rays
• Dark Catalysis
• Cooling in a Dissipative Dark Sector
• Exploring light mediators with low-threshold direct detection experiments
• Casting a Wide Signal Net with Future Direct Dark Matter Detection Experiments
• Direct Detection of Mirror Matter in Twin Higgs Models
• Direct detection of non-galactic light dark matter
• Long range dark matter self-interactions and plasma instabilities
• Simulations of Galaxy Cluster Collisions with a Dark Plasma Component
• Do magnetic fields prevent mirror particles from entering the galactic disk?

Cited by in corpus (1)

• Dark Matter Raining on DUNE and Other Large Volume Detectors