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arXiv · 2509.26552

The REDTOP experiment: a $\eta/\eta^{\prime}$ factory to explore dark matter and physics beyond the Standard Model

Marcin Zielinski·Corrado Gatto
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Abstract

The REDTOP experiment is a proposed super-$\eta$/$\eta'$ factory aimed at exploring physics beyond the Standard Model in the MeV-GeV range and rare $\eta$/$\eta'$ meson decays. With projected production rates exceeding $10^{13}$ $\eta$/year and $10^{12}$ $\eta'$/year, REDTOP will enable studies of symmetry violations and all four portals to the Dark Sector. Preliminary studies show sensitivity, which could open a broad possibility for exploring new physics and contribute to a deeper understanding of fundamental interactions within the Standard Model. Such high statistics experiments and the required sensitivity can only be achieved with a high intensity proton or pion beam, available at several accelerator facilities worldwide. This article discusses the physics potential of the REDTOP experiment, the detector design, and the future beam requirements.

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Marcin Zielinski, Corrado Gatto. 2025-09-30. The REDTOP experiment: a $\eta/\eta^{\prime}$ factory to explore dark matter and physics beyond the Standard Model. https://doi.org/10.5506/aphyspolbsupp.18.4-a5

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