Abstract
The GlueX experiment is housed in the newest experimental hall at the Thomas Jefferson National Accelerator Facility in Newport News, Virginia. It was successfully commissioned in 2015 and is in its third year of data taking. GlueX uses a 12 GeV electron beam incident on a diamond radiator, producing a linearly polarized, coherent Bremsstrahlung photon beam. The ultimate goal of GlueX is to search for exotic hybrid mesons (e.g. qq̄g), with either exotic or conventional quantum numbers, whose existence, or lack thereof, would allow for the exploration of the gluon-gluon coupling present in QCD through the manifestation of hadrons with gluonic degrees of freedom. Photo-production at these energies is fairly unexplored and the linear beam polarization allows GlueX to discriminate between various production mechanisms which may be an effective way to identify such exotic hybrid mesons. In addition to exotic mesons, GlueX will also be poised to map out the conventional meson spectrum and to study the spectrum of excited vector mesons, which are often poorly understood. In these proceedings, we will present an overview of the GlueX experiment, its goals, current physics results, and future plans.
Highlights
The Thomas Jefferson National Accelerator Facility’s (JLab) is home to the Continuous Electron Beam accelerator Facility (CEBAF) that has recently completed an upgrade from 6 GeV to 12 GeV and circulates electrons in a race track shaped accelerator
The GlueX spectrometer has been performing well allowing the reconstruction of reactions with multiple neutral final states (e.g. 4γ and 5γ final states) where often the prior data is sparse and statistics are dwarfed by GlueX
This puts GlueX in prime position to measure or set limits on the pentaquark candidates of LHCb. a DIRC detector will be partially installed and commissioned in 2018 and should provide much improved π/K separation
Summary
The Thomas Jefferson National Accelerator Facility’s (JLab) is home to the Continuous Electron Beam accelerator Facility (CEBAF) that has recently completed an upgrade from 6 GeV to 12 GeV and circulates electrons in a race track shaped accelerator. As part of the 12 GeV upgrade program a new experimental hall, Hall-D, was constructed. The GlueX experiment is located after 5.5 passes through the accelerator in Hall-D. The photon beam is tagged, collimated, and passed into the experimental hall. GlueX has a beam resolution of about 0.1% and momentum/energy resolutions of between 1 and 5%
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