JLab Eta Factory Experiment*

The confinement nature of Quantum Chromodynamics (QCD) and the new physics Beyond the Standard Model (BSM) are two frontiers in contemporary science.  The system of η and η′  offers a rich laboratory to explore both fundamental topics. The QCD symmetries at low energies are manifested in the most unambiguous form in  η and η'. Thus, the precision measurement of their properties will yield light on our understanding of the low-energy symmetry structure, as well as the origin and dynamics of the confinement QCD. In addition, the  η/η′ meson has quantum numbers of vacuum (except parity) with its strong and electromagnetic decays being either anomalous or forbidden to the lowest order due to symmetries or angular momentum conservation. This enhances the relative importance of higher order contributions, making the rare  η/η′ decays a sensitive hadronic probe for weakly-coupled new forces.  Searching for sub-GeV dark gauge bosons, and C-violating, P-conserving interactions in various η/η′ decays will extend our knowledge of the dark sector and explore new sources of CP violation that is needed to explain the observed matter and anti-matter asymmetry in the universe. The JLab Eta Factory experiment is aimed to measure various η/η′ decays with emphasize on the rare neutral decay mode, using the GlueX apparatus and an upgraded Forward Calorimeter (FCAL-II). The current status of experiment and  its physics impacts will be presented.