PoS - Proceedings of Science
Volume 332 - XIV International Conference on Heavy Quarks and Leptons (HQL2018) - Lepton Flavor Violation, Muon/tau Physics and Dark Sector
Dark sector search at BES III
F. Li* and  On behalf of the BESIII collaboration
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Pre-published on: December 05, 2018
Published on: December 11, 2018
Using the world largest $\psi(3770)$ and $J/\psi$ data samples taken by the BESIII detector, we perform several searches for the dark photon in a mass range of 0.01 to 3.4 GeV/$c^2$. No significant signal is observed. The kinematic mixing strength $\varepsilon$ between the standard model photon and the dark photon is constrained in the range of $10^{-4} \sim 10^{-2}$.
DOI: https://doi.org/10.22323/1.332.0062
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