Electron-Nucleus Scattering at LDMX

The Light Dark Matter eXperiment, LDMX, will scatter a 4GeV monoenergetic electron beam off of a tungsten target with the goal of observing dark matter production. With an exposure of 4E14 electrons on target, we expect to see approximately 100 million electronuclear interactions. LDMX is expected to achieve excellent acceptance for the outgoing electron and hadrons in the forward region and will provide measurements that will aid in the reduction of uncertainties that arise from nuclear effects (Fermi motion, binding energy, and rescattering/absorption of hadrons). The ability to make measurements of both the outoing electron and a signifcant portion of final state hadrons, including neutrons, will further constrain interaction models, which will be useful for the DUNE program whose phase space is very well covered by interactions in LDMX. Furthermore, these interactions will span a large phase space, covering quasielastic interactions, the resonance and shallow inelastic regions, up to deep inelastic scattering. These measurements of the outgoing electron and hadron kinematics will be helpful in the modeling and understanding of neutrino oscillations.