Probing Long-Lived Particle Production in Muon Decays at the SNS with a Highly Capable Hydrocarbon Detector
This paper proposes using a tons-scale hydrocarbon scintillator detector at the Spallation Neutron Source to search for sub-GeV dark sector particles, such as axion-like particles and heavy neutral leptons, produced in muon decays, demonstrating the potential for order-of-magnitude sensitivity improvements over current limits through effective cosmic ray background rejection.
M. Andriamirado, A. B. Balantekin, C. D. Bass, O. Benevides Rodrigues, E. P. Bernard, N. S. Bowden, C. D. Bryan, R. Carr, T. Classen, A. J. Conant, N. Craft, G. Deichert, A. Erickson, M. D. Fuller, A. (…)2026-06-18⚛️ hep-ex