Search for a Hidden Sector Scalar from Kaon Decay in the Di-Muon Final State at ICARUS
We present a search for long-lived particles (LLPs) produced from kaon decay that decay to two muons inside the ICARUS neutrino detector. This channel would be a signal of hidden sector models that can address outstanding issues in particle physics such as the strong CP problem and the microphysical...
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Sprache: | eng |
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Zusammenfassung: | We present a search for long-lived particles (LLPs) produced from kaon decay
that decay to two muons inside the ICARUS neutrino detector. This channel would
be a signal of hidden sector models that can address outstanding issues in
particle physics such as the strong CP problem and the microphysical origin of
dark matter. The search is performed with data collected in the Neutrinos at
the Main Injector (NuMI) beam at Fermilab corresponding to $2.41\times 10^{20}$
protons-on-target. No new physics signal is observed, and we set world-leading
limits on heavy QCD axions, as well as for the Higgs portal scalar among
dedicated searches. Limits are also presented in a model-independent way
applicable to any new physics model predicting the process $K\to
\pi+S(\to\mu\mu)$, for a long-lived particle S. This result is the first search
for new physics performed with the ICARUS detector at Fermilab. It paves the
way for the future program of long-lived particle searches at ICARUS. |
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DOI: | 10.48550/arxiv.2411.02727 |