Speaker
Description
The 10 ton liquid argon (LAr) scintillation detector Coherent CAPTAIN-
Mills, at the LANSCE facility of the Los Alamos National Laboratory,
sits at a distance of 23 m from the core of the Lujan Center spallation
source, which is a copious source of neutrinos from stopped pions, as
well as, possibly, new particles belonging to a hypothetical Dark Sector
of particle physics. Besides studying neutrino interactions in LAr at
energies below 52.8 MeV, relevant for future neutrino experiments,
CCM has a rich physics program comprising searches for Dark
Photons, Axion-like Particles (ALPs), and neutral heavy leptons with
masses in the range of keV to MeV, exploring new regions of parameter
space for these searches. A prototype detector instrumented with 120
PMTs, CCM120 operated between 2018 and 2019, demonstrating the potential
of such a detector for the search of Sub-GeV dark matter. The upgraded
CCM200 detector, with 200 PMTs, improved shielding and LAr filtration
and purification system is now taking beam. In this talk the status of
the experiment, as well as results from CCM120 and expected sensitivity
to new physics of CCM200 will be presented.
