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<p style="margin-top:0;margin-bottom:0">Hi, everyone.</p>
<p style="margin-top:0;margin-bottom:0">I am planning to submit an abstract to the DNP meeting, appended below. Comments are welcome.</p>
<p style="margin-top:0;margin-bottom:0">Simon</p>
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<p style="margin-top:0;margin-bottom:0">--------------------------------</p>
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<div>Status of the JLab Eta Factory (JEF) experiment<br>
<br>
The JLab Eta Factory (JEF) experiment is designed to study various decays of <br>
the eta meson using the GlueX detector in Hall D at Jefferson Lab. The <br>
experimental program includes measuring the Dalitz distribution from <br>
eta->pi+pi-pi0 to determine the m_u/m_d quark mass ratio, looking for evidence <br>
for new C-violating, P-conserving physics, providing input to higher-order chiral perturbation theory calculations, and searching for evidence of dark matter.<br>
The latter two physics channels rely on measuring the rare eta -> pi0 gamma <br>
gamma decay mode that will require an updgrade to the existing GlueX <br>
equipment, which is a fixed target apparatus based on a 2-Tesla solenoidal <br>
magnet.<br>
Charged tracks are reconstructed using drift chambers within the magnet and <br>
neutral particles are detected in the forward direction in the Forward Calorimeter (FCAL), an array of Lead Glass blocks. The JEF program calls for replacing the ~80x80 cm^2 region of the FCAL around the beam line with an array of 2x2 cm^2 Lead Tungstate crystals.
The status of <br>
this upgrade will be presented.<br>
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