University of Waterloo
200 University Avenue West
Waterloo, Ontario, Canada N2L 3G1
Phone: (519) 888-4567 ext 32215
Fax: (519) 746-8115
Department of Physics, Engineering Physics & Astronomy
Dr. Bramante's research interests lie in the areas of dark matter, cosmology, and high energy theory. He seeks out new explanations, and new methods to test them, for puzzles such as the nature of dark matter, the non-zero cosmological constant, and the present abundance of matter as compared to anti-matter.
I will discuss why we may expect dark matter to be very heavy, and proceed to show that underground experiments like LUX/LZ, PandaX-II, XENON, and PICO could discover dark matter up to the Planck mass and beyond, with new searches for dark matter that scatters multiple times in these detectors. This opens up significant discovery potential via re-analysis of existing and future data. I will also discuss a new effect which substantially enhances experimental and astrophysical sensitivity to large dark matter scattering cross-sections: while passing through atmospheric or solid overburden, there is a maximum number of scatters that dark matter undergoes, determined by the total number of scattering sites it passes, such as nuclei and electrons. This extends the reach of some published limits and future analyses to arbitrarily large dark matter scattering cross-sections.