Axions are hypothetical particles that couple extremely weakly to regular matter, which makes them challenging to probe in the laboratory. However, axions should be produced in the dense environments of compact stars, providing an additional cooling channel that leads to well-known constraints on the axion’s couplings to matter. These constraints are indirect, and although compact stars are...
I discuss an unprecedented search channel for boosted dark matter (BDM) signals coming from the present universe. The signal process is initiated by the scattering of high-energy BDM off an electron/nucleon. If the dark matter (DM) is dark-sector U(1)-charged, the scattered BDM may emit a dark gauge boson (called "dark-strahlung") decaying to a SM fermion pair. In fact, the existence of this...
Cold gas clouds in the Milky Way have the potential to discover dark matter. Sensitivity to dark matter models including strongly-interacting, millicharged, and superheavy dark matter will be presented. The basic logic behind gas cloud bounds on dark matter will also be discussed.
Repurposing large underground detectors to search
for the photon signal of inelastic dark matter
In this talk I will discuss recent observations of the Andromeda galaxy in gamma rays and implications for dark matter.
I will present the phenomenology of the Secretly Asymmetric Dark Matter (SADM) scenario, where the DM relic abundance is set through an asymmetry generated in multiple DM flavors in the early universe, despite an unbroken and gauged DM number symmetry. There is a massless dark photon associated with the DM number symmetry, and DM flavors with asymmetries of opposite signs can form bound...
This talk will mostly follow the discussions found in https://arxiv.org/abs/1711.04773 and https://arxiv.org/abs/1902.04082. We will discuss the cosmological implications of the Co-Decaying Dark Matter Model--a recently proposed mechanism for depleting the density of dark matter through the decay of nearly degenerate particles. This model generically predicts the existence of an Early Matter...
