New Directions for Axion Searches via Scattering at Reactor Neutrino Experiments.
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Searches for pseudoscalar axionlike-particles (ALPs) typically rely on their decay in beam dumps or their conversion into photons in haloscopes and helioscopes. We point out a new experimental direction for ALP probes via their production by the intense gamma ray flux available from megawatt-scale nuclear reactors at neutrino experiments through Primakoff-like or Compton-like channels. Low-threshold detectors in close proximity to the core will have visibility to ALP decays and inverse Primakoff and Compton scattering, providing sensitivity to the ALP-photon and ALP-electron couplings. We find that the sensitivity to these couplings at the ongoing MINER and various other reactor based neutrino experiments, e.g., CONNIE, CONUS, ν-cleus, etc., exceeds existing limits set by laboratory experiments and, for the ALP-electron coupling, we forecast the world's best laboratory-based constraints over a large portion of the sub-MeV ALP mass range.
author list (cited authors)
Dent, J. B., Dutta, B., Kim, D., Liao, S., Mahapatra, R., Sinha, K., & Thompson, A.
complete list of authors
Dent, James B||Dutta, Bhaskar||Kim, Doojin||Liao, Shu||Mahapatra, Rupak||Sinha, Kuver||Thompson, Adrian