Duarte, L.Lin, L.Lindner, M.Kozhuharov, V.Kuleshov, S.V.de Jesus, A.S.Queiroz, F.S.Villamizar, Y.Westfahl, H., Jr.2023-09-112023-09-112023-06European Physical Journal C Open Access Volume 83, Issue 6 June 2023 Article number 51414346044https://repositorio.unab.cl/xmlui/handle/ria/53118Indexación: Scopus.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-→ γA′ 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 ϵ2∼ 10 - 12 . 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.enDark MatterMissing Mass (Astrophysics)DarknessArtículoAttribution 4.0 International (CC BY 4.0)10.1140/epjc/s10052-023-11603-x