Speaker
Description
The DUNE experiment directs a neutrino beam from Fermilab towards a 40 kiloton
liquid argon time-projection chamber (TPC) 1300 km away in the Sanford Underground
Research Facility in South Dakota. By measuring electron neutrino and anti-neutrino
appearance from the predominantly muon neutrino and anti-neutrino beams, DUNE
will determine the neutrino mass ordering and explore leptonic CP violation. The
neutrino oscillation phenomena explored by DUNE require robust determinations of
the (anti-)neutrino energies by reconstructing the particles produced in charged current
reactions. Among the particles emerging from the interaction which carry significant
energy, neutrons are the most challenging to reconstruct. The CAPTAIN collaboration
has made the first measurement of the neutron-argon cross section between 100 and
800 MeV of neutron kinetic energy - an energy regime crucial for neutrino energy
reconstruction at DUNE. We made the measurement in a liquid argon TPC with 400 kg
of instrumented mass. I describe the measurement, its importance to DUNE, and discuss future plans.
Collaboration name
CAPTAIN Collaboration
