[Halld-physics] Abstract for Hadron2019

[gasparan at jlab.org]

  Dear Sasha,

 I think it is a good idea to present these subjects at the Hadron
 conference.

 Ashot



> Dear Colleagues,
>
>
> I am planning to attend the Hadron2019 conference which will take
>
> place in China in August.  Below is a draft of an abstract. The deadline
>
> for submission is tomorrow (April 30).
>
>
> Comments are welcome.
>
>
> Cheers,
>
>        Sasha
>
>
>
>
> Title: Eta Decay Program at GlueX
>
>
> Abstract:
>
> The GlueX detector in the experimental Hall D at Jefferson Lab
> was designed to search for gluonic excitations in the spectra
> of light mesons using photon beams. The detector provides a unique
> capability to perform a precision measurement of the
> $\eta \to \gamma \gamma$ decay width via the Primakoff effect
> (PrimEx D experiment) and study rare decays of eta mesons.
>
> Measurement of the eta decay width is essential for the determination
> of fundamental properties such as the ratios of the light quark
> masses and the  $\eta$−$\eta^\prime$ mixing angle, and will provide an
> important test  of chiral symmetry breaking in QCD. The physics of rare
> eta decays spans from critical tests of chiral perturbation
> theory to the search for lepto-phobic dark matter candidates.
>
> I will give an overview of the ongoing PrimEx D experiment and the
> physics program of rare eta decays, and discuss GlueX plans for the
> future.
>
>
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