Particle Physics Seminars at BNL

SB/BNL Joint Cosmo seminar (at Stony Brook) [Note special day]: Annika Peter, Ohio State: "All mergers great and small: dark matter constraints from hierarchical structure formation"



Of the many particle properties of dark matter that remain unknown, the self-collisional cross section is one that may be possible to measure using astronomical observations, and only astronomical observations. In this talk, I will show that the hierarchical growth of structure in the Universe can be thought of as a series of massive dark matter collider experiments. I will show what kinds of signatures collisional dark matter leaves in these merger events, and what scale of cross section each type of system may be sensitive to.