Conveners
DM I
- Jia Liu (University of Chicago)
I will be discussing constraints on light dark matter and the effects of the astrophysical neutrino
background. This will include a discussion of bremsstrahlung, the Migdal effect, and dark matter
scattered by cosmic rays, as well as the effect of these processes on the background induced by
coherent elastic neutrino-nucleus scattering.
The non-detection of GeV-scale WIMPs has led to increased interest in more general candidates, including sub-GeV dark matter. Direct detection experiments, despite their high sensitivity to WIMPs, are nominally blind to dark matter much lighter than ∼1 GeV. Recent work has shown that cosmic rays scattering with sub-GeV dark matter would both alter the observed cosmic ray spectra and produce a...
Within the Dynamical Dark Matter (DDM) framework, an ensemble of unstable particle species whose decay widths are balanced against their cosmological abundances collectively constitutes the dark matter in our universe. The constraints on DDM ensembles whose constituent particles decay to visible-sector particles with a non-negligible branching fraction are well established and quite...
The Milky Way halo is the brightest source of dark matter annihilation on the sky. Indeed, the potential strength of the Galactic dark matter signal can supersede that expected from dwarf galaxies and galaxy groups even in regions away from the Inner Galaxy. We present the results of a search for dark matter annihilation in the smooth Milky Way halo for $|b| > 20^\circ$ and $r < 50^\circ$...
In this talk, I will discuss predictions of anomaly-free dark matter models for direct and indirect detection experiments. In these models, a fermionic dark matter candidate is predicted by anomaly cancellation, its mass is defined by the new symmetry breaking scale, and its stability is guaranteed by a remnant symmetry after the gauge symmetry is broken. Relic density and perturbative...
Many proposals for physics beyond the Standard Model give rise to a non-minimal dark sector containing many degrees of freedom. In this talk, we explore the cosmological implications of the non-trivial dynamics which may arise within such dark sectors, focusing on decay processes which take place entirely among the dark constituents. First, we demonstrate that such decays can leave dramatic...
The only coupling dark matter is guaranteed to have with the standard model is through gravity. I will discuss our recent proposal for a direct detection concept based on an array of quantum-limited sensors, designed to search for dark matter using only this gravitational coupling.
