Conveners
DM III
- Kuver Sinha
Dark matter (DM) substructure is expected to exist over a large range of scales in our Galaxy. Its properties, such as its spatial distribution and abundance at different mass scales, can strongly correlate with the underlying particle physics properties of dark matter. Inferring DM substructure properties can thus hold the key to pinning down the particle nature of DM. In this talk, I will...
The dark matter (DM) content in the local solar neighborhood is an important ingredient for direct detection experiments on Earth such as LZ, Xenon, PandaX, and searches for DM in charged cosmic ray data from PAMELA, AMS-02, DAMPE, and CALET. Traditionally, the local DM density has been estimated by analyzing the vertical motion of different ‘tracer’ stars in the solar neighborhood. These...
To solve the small scale issues in galaxies with dark matter, there are two major scenarios: self-interacting dark matter and fuzzy dark matter. The mass of the self-interacting dark matter is about GeV, and the mass of fuzzy dark matter need to be 10^{-22} eV. We propose a novel mechanism that by scattering with subdominant WIMP, the ultralight field solves the small scale issues in galaxies....
If dark matter has strong self-interactions, future astrophysical and cosmological observations, together with a clearer understanding of baryonic feedback effects, might be used to extract the velocity dependence of the dark matter scattering rate. To interpret such data, we should understand what predictions for this quantity are made by various models of the underlying particle nature of...
We describe two natural scenarios in which both dark matter weakly interacting massive particles (WIMPs) and a variety of supersymmetric partners should be discovered in the foreseeable future. In the first scenario, the WIMPs are neutralinos, but they are only one component of the dark matter, which is dominantly composed of other relic particles such as axions. (This is the multicomponent...
We discuss the possibility of finding an upper bound on the lepton number violation scale using the cosmological bound on the cold dark matter relic density. We investigate a simple relation between the origin of neutrino masses and the properties of a dark matter candidate in the context of simple theories where the new symmetry breaking scale defines the lepton number violation scale, which...
An interesting class of models posits that the dark matter is a Majorana
fermion which interacts with a quark together with a colored scalar mediator. Such a
theory can be tested in direct detection experiments, through dark matter scattering
with heavy nuclei, and at the LHC, via jets and missing energy signatures. Motivated
by the fact that such theories have spin-independent interactions...