The HIBEAM Experiment at the ESS

The European Spallation Source (ESS) offers an opportunity for a fundamental physics program with a unique reach.  In this talk, the HIBEAM project is described. The HIBEAM collaboration has proposed a suite of searches and measurements which would use the high cold neutron flux from the ESS. The program includes searches for conversions of free neutrons to antineutrons and to mirror neutrons with regeneration. The physics program addresses some of the central unresolved questions in particle physics and cosmology such as the energy scale and mechanism for baryon number violation, the origin of the baryon-antibaryon asymmetry of the universe, the composition of dark matter, and the mechanism for neutrino mass generation. HIBEAM would take data following ESS commissioning in the mid- to late 2020s. HIBEAM will also serve to prototype technologies towards  enhancing the sensitivity of HIBEAM's search program by several orders of magnitude.