Can hidden LHC detectors spot ghostly supersymmetry particles?

Physicists modeled how light, long-lived neutralinos—predicted by supersymmetric models—would create distinctive single-photon signals at eight proposed remote detectors ringing the LHC. They found ANUBIS far outperforms other detectors by accounting for the full flight path of the parent meson carrying the neutralino, while FASER lags considerably. These results reshape the discovery potential for a class of supersymmetry theories already producing rare meson decays.