The REDTOP experiment: a η/η^′ factory to explore dark matter and physics beyond the Standard Model

2025/09/30 by Zielinski, Marcin, Gatto, Corrado
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)

paper · doi:10.48550/arxiv.2509.26552

Abstract

The REDTOP experiment is a proposed super-η/η' factory aimed at exploring physics beyond the Standard Model in the MeV-GeV range and rare η/η' meson decays. With projected production rates exceeding 10¹³ η/year and 10¹² η'/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.

Citations

• Final state rescattering effects in axio-hadronic η and η^′ decays
• Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm
• Proposal for the Wide Angle Shower Apparatus (WASA) at COSY-Juelich - "WASA at COSY"

Related

• The REDTOP experiment
• The REDTOP experiment: Rare η/η^′ Decays To Probe New Physics
• The plan for a super η factory at Huizhou accelerator complex
• New-physics searches in C P-violating η muonic decays
• Experiments and Facilities for Accelerator-Based Dark Sector Searches