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arXiv · 2605.13696

Dark photon searches in the photon channel

D. Aristizabal Sierra·A. Betancur·K. Pohl·J. Velez
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Abstract

Spectral shape differences between photons produced in $\pi^0\to\gamma+\gamma$ and $\pi^0\to\gamma+A_D$ may provide a new avenue for dark photon searches. Assuming 70 $\mu$m thick tungsten foils separated by 200 $\mu$m and a 1 GeV proton beam, we developed a GEANT4 model to estimate photon production and detection including background. Our results demonstrate that multiple campaign runs with a 10-50 $\mu$A beam could probe previously unexplored regions of parameter space in models where the dark photon has predominantly invisible decays. The results are highly model independent.

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D. Aristizabal Sierra, A. Betancur, K. Pohl, J. Velez. 2026-05-13. Dark photon searches in the photon channel. https://arxiv.org/abs/2605.13696

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