Speaker:
Yuhsin Tsai
Institution:
UC Davis
Date:
Wednesday, February 5, 2014
Time:
3:00 pm
Location:
FRH 4135
ABSTRACT:
In this talk I will discuss a topological modification of the dark matter/nucleus scattering for direct detection experiments. Instead of having a standard 2 to 2 scattering with contact operators, we look at a tree level 2 to 3 process, X N -> X N phi, with phi being a SM singlet carrying the same dark charge which stabilizes the DM. The interesting phenomenology from the setup motivates the study of the dark mediator Dark matter (dmDM). By focusing on a simple model that gives a sizable scattering cross section, we discuss the direct-detection consequences of this scenario and find that a heavy O(100 GeV) dmDM candidate fakes different O(10 GeV) standard WIMPs at different experiments. Various collider and astrophysical constraints will be addressed. A large portion of the allowed dmDM parameter space are detectable in future experiments, and the model may provide new ways in reconciling different types of DM experiments.
Host:
Flip Tanedo