[Halld-physics] APS abstract

[Alexander Somov]

Hi,

Here is a draft of the APS abstract, please take a look.  I'll link  it to the wiki page shortly.

Thanks,
              Sasha


JLab Eta Factory experiment in Hall D

The new experiment, JLab Eta Factory (JEF), in the experimental Hall-D at Jefferson Lab
will extend the physics  potential of the GlueX beyond the  main  spectroscopy  program
and study rare decays of eta mesons. Among various physics topics, the
experiment will focus on decays of eta mesons to the $\eta\to\pi^0\gamma\gamma$ final
state. This decay mode  provides an important information for higher-order calculations
in chiral perturbation theory. The final state is ideal for the search of the leptophobic
dark $B$ boson in the reactions  $\eta\to\B\gamma$,  $B\to\pi^0\gamma$ and
the scaler dark matter mediator $S$ in the channel $\eta\to\pi^0S$, $S\to\gamma\gamma$.
The experiment requires to upgrade the inner part of the forward lead glass calorimeter of the GlueX detector with high-granularity, high-resolution lead tungstate $\rm PbWO_{\rm 4}$  scintillating crystals. The detector will be ready to take data in 2023.  I will give an overview of the JEF project.

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