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arXiv · 2206.05305

Search for Dark Sector by Repurposing the UVX Brazilian Synchrotron

L. Duarte·L. Lin·M. Lindner·V. Kozhuharov·S. V. Kuleshov·A. S. de Jesus·F. S. Queiroz·Y. Villamizar·H. Westfahl Jr
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Abstract

We propose the first Search for Dark Sector at the Brazilian Synchrotron Light Laboratory, site of Sirius, a fourth-generation storage ring. We show that UVX, Sirius predecessor, can be a promising dark sector detector, SeDS, with unprecedented sensitivity. The search is based on a 1-3 GeV positron beam impinging on a thick target leading the $e^+ e^- \rightarrow \gamma A'$ reaction, followed by a missing mass spectrum event reconstruction. We show that SeDS has the potential to probe dark photons with masses up to 55 MeV and kinetic coupling down to $\epsilon \sim 10^{-14}$ within months of data. Therefore, such experiment would constitute the best dark photon probe worldwide in the 10-55 MeV mass range, being able to probe an unexplored region of parameter space.

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L. Duarte, L. Lin, M. Lindner, V. Kozhuharov, S. V. Kuleshov, A. S. de Jesus, F. S. Queiroz, Y. Villamizar, H. Westfahl Jr. 2022-06-10. Search for Dark Sector by Repurposing the UVX Brazilian Synchrotron. https://doi.org/10.1140/epjc%2Fs10052-023-11603-x

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