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GlueX: Photoproduction of Hybrid Mesons

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Elton Smith
Updated by:
Elton Smith
Document Created:
28 May 2012, 10:40
Contents Revised:
08 Jun 2012, 12:21
Metadata Revised:
02 Aug 2012, 10:01
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The goal of the GlueX experiment [1] is to provide critical data to help understand the soft gluonic field responsible for binding quarks in hadrons. Hybrid mesons, and in particular exotic hybrid mesons, provide the ideal
laboratory for testing QCD in the confinement regime since these mesons explicitly manifest the gluonic degrees of freedom. Photoproduction is expected to be particularly effective in producing exotic hybrids but there is little data on the photoproduction of light mesons. GlueX will use the new
12-GeV electron beam to produce a 9-GeV beam of linearly polarized photons using the technique of coherent bremsstrahlung. A solenoid-based
hermetic detector is under construction, which will be used to collect data on meson production and decays. These data will also be used to study the spectrum of conventional mesons, including the poorly understood excited vector mesons. This talk will describe the latest theoretical developments [2] to help understand how the data of hybrid mesons can provide insights into
the fundamental theory of strong interactions.

[1] JLab Experiment E12-06-102, {\em Mapping the Spectrum of Light Quark Mesons and Gluonic Excitations with Linearly Polarized Photons,}\_prog/proposals/06/PR12-06-102.pdf.
[2] J.J. Dudek {\em et al.} (Hadron Spectrum Collaboration), Phys. Rev. D {\bf 10}, 034508 (2010).

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meson spectroscopy
Notes and Changes:
corrected a typo
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