WebApr 1, 2024 · We derive a conservative lower-limit of the dark photon mass around 8.5 MeV from the current Planck data if the mixing between the dark photon and ordinary photon is larger than O (10 −9 ). We also find that the future CMB stage-IV experiments can probe up to 17 MeV dark photon. Download to read the full article text WebThe dark photon can obtain a highly suppressed mixing-induced coupling to the electromagnetic current, providing a portal through which dark photons can interact with ordinary matter. This review focuses on A ′ scenarios that are potentially accessible to accelerator-based experiments.

[1907.07046] Probing invisible decay of dark photon at BESIII and ...

WebApr 25, 2024 · In the previous study, it was assumed that the dark photon has a Stückelberg mass, or a mass generated by the Higgs mechanism with a sufficiently heavy Higgs boson. In this paper we consider a case in which the Higgs boson is not fully decoupled; the Higgs field changes its vacuum expectation value after inflation. WebDark photons are particles invoked in some extensions of the Standard Model which could account for at least part of the dark matter content of the Universe. ray white bellingen

Dark photon search in the mass range between 1.5 …

WebJun 24, 2016 · In the low mass region, MS = (53{62:8) GeV, the main contribution to nal state radiation comes from the annihilation into two b-quarks and a photon, while in the heavy mass region the annihilation into two W gauge bosons and a photon is the dominant contribution. These results are very important to understand the visibility of the gamma … WebTo broaden the exploration of this predicted dark matter particle, a second search was carried out considering some heavy Higgs bosons with masses ranging from 400 GeV to 3 TeV, produced either in gluon-gluon Fusion (ggF) or in Vector-Boson-Fusion (VBF) modes. WebMay 5, 2015 · Abstract. A sample of 1.69 × 10 7 fully reconstructed π 0 → γe + e – decay candidates collected by the NA48/2 experiment at CERN in 2003–2004 is analyzed to search for the dark photon (A') production in the π0→γA' decay followed by the prompt A' → e + e – decay. No signal is observed, and an exclusion region in the plane of the dark … ray white belmont vic