Neutrinos exist but we don’t know some of their most basic properties.  Dark matter exists but we don’t know what it is.  New experiments are being devised to solve these mysteries.  Theory is important to guide searches in the most promising directions and to enable precision measurements that are critical to next generation discovery potential.  I discuss theoretical tools to address the “neutrino interaction problem” for long baseline neutrino experiments, and mention related applications to precision measurements with muons.  I describe recent theoretical developments that tightly constrain the possible interactions of dark matter particles with nuclei in underground detectors

Host: Susan Gardner