The Mitchell Conference on Collider, Dark Matter, and Neutrino Physics 2024

Session

Dark Matter

May 23, 2024, 10:45 AM

Hawking Auditorium (Mitchell Institute, Texas A&M University)

Conveners

Dark Matter

• Tao Xu (The University of Oklahoma)

10. A Lower Bound on Dark Matter Mass

Mustafa Amin

5/23/24, 10:45 AM

I will argue that if the density of dark matter in the early
universe is dominated by subhorizon, non-relativistic field modes,
then there is a relatively model-independent lower bound on the
mass of dark matter particles $m > 10^{-19}\, {\rm eV}$. The bound comes from considerations of (observed lack of) suppression of structure due
to free streaming, and (observed lack of) an enhancement...

21. Superheavy Decaying Dark Matter

Rouzbeh Allahverdi (University of New Mexico)

5/23/24, 11:10 AM

String theory setups can accommodate superheavy dark matter with the correct relic abundance. In addition, they may induce tiny R-parity violating couplings which make dark matter unstable with a lifetime well above the age of the universe. In this talk, I will discuss the high-energy gamma ray and neutrino signals from various three-body decays of superheavy neutralinos. I will then show how...

16. Minimal Dark Matter Freeze-in with Low Reheating Temperatures and Implications for Direct Detection

Barmak Shams Es Haghi (University of Texas at Austin)

5/23/24, 11:35 AM

We investigate the influence of the reheating temperature of the visible sector on the freeze-in dark matter (DM) benchmark model for direct detection experiments, where DM production is mediated by an ultralight dark photon. Here we consider a new regime for this benchmark: we take the initial temperature of the thermal Standard Model (SM) bath to be below the DM mass. Then the production...

39. Light axions with kinetic coupling

Prof. Savvas Koushiappas (Brown University)

5/23/24, 12:00 PM

I will discuss light dark matter candidates with kinetic coupling. More specifically, a condensate dark matter in a two-field model where the axion is coupled to a second moduli field at the level of its kinetic term. I will discuss cosmological consequences of such a dark matter candidate.