Conveners
DM VIII
- Bibhushan Shakya (CERN)
Dark matter can deposit energy in neutron stars and heat them to temperatures that could be detected by upcoming infrared telescopes like James Webb Space Telescope (JWST). These observations have a potential to complement and outperform terrestrial direct detection in a large range of dark matter masses. The difference is particulalrly striking for inelastic dark matter. Electrons are also...
Macroscopic dark matter candidates are large composite objects which escape standard direct detection constraints. Macros with substantial elastic scattering cross sections off visible matter can catalyze a variety of fusion processes in stars. We consider the effects of this process on Red Giant branch stars. We find that macros can ignite the helium core of these stars prematurely. We place...
The mere observation of the first stars (Pop III stars) in the universe can be used to place tight constraints on the strength of the interaction between dark matter and regular, baryonic matter. We apply this technique to a candidate Pop III stellar complex discovered with the HubbleSpace Telescope at z∼7 and find some of the deepest bounds to-date for both spin-dependent and...
Large composite states of dark fermions bound by a scalar provide a potential field under which Standard Model nuclei can accelerate to large kinetic energies, resulting in copious amounts of collisional radiation and, at the highest energies, thermonuclear fusion. In this talk, I discuss how this effect can cause white dwarfs to explode, as well as its detectability prospects at neutrino...
An excess of 511 keV photons has been detected from the central region of the Milky Way. It has been suggested that the positrons responsible for this signal might be produced through the Hawking evaporation of primordial black holes. After evaluating the constraints from INTEGRAL, COMPTEL, and Voyager 1, we find that black holes in mass range of ∼ (1 − 4) × 10^16 g could potentially produce...
Strong bounds from direct detection experiment put stringent limit on the dark matter mass which forces us to go beyond WIMP model of dark matter. In recent years the light mass dark matter particles gain lots of attention among the particle physicists. In this talk I will discuss about light gauge bosons motivated from U(1) extension of standard model and axions which can be a possible dark...
