<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><br><div style="text-align: center;"><b><div style="display: inline !important; "><b>Dark Forces, Dark Matter, and the GeV-Scale Discovery Frontier</b></div></b></div><div style="text-align: center;"><br></div><div style="text-align: center;">Philip Schuster</div><div style="text-align: center;">Perimeter Institute for Theoretical Physics Faculty Member</div><div style="text-align: center;">SLAC Research Associate</div><div style="text-align: center;"><br></div>The search for dark matter and new forces mediated by sub-GeV particles with very weak coupling to matter (“dark forces”) is an emerging frontier in fundamental physics. I will present the theoretical motivations for dark forces and their possible connections to dark matter and the anomalous magnetic moment of the muon. I will also discuss strategies, results, and prospects for searches at high-energy colliders, flavor factories, and dedicated fixed-target experiments. I will focus particularly on the near-term program of searches for dark forces at Jefferson Lab, including APEX in Hall A and HPS in Hall B, and I will briefly describe opportunities to directly search for dark matter at Jefferson Lab in the future.<br><div style="text-align: center;"><br></div><div style="text-align: center;">Tuesday, April 22 at 3 p.m.</div><div style="text-align: center;">CEBAF Center auditorium</div><div style="text-align: center;">Cookies & coffee in the CEBAF Center lobby, 2:30 p.m.</div><div style="text-align: center;"><br></div></body></html>