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Title: Searching for Hybrid Mesons with GlueX

Abstract

Hybrid mesons consist of a quark-antiquark pair bound together by a gluonic field that is in an excited state. Measuring the spectrum of these states will provide valuable information on the gluonic degrees of freedom of QCD in the quark-confinement regime.A rich spectrum of hybrid meson states has been predicted, but only a few experiments have reported evidence of their existence. The GlueX experiment at Jefferson Lab is designed to search for and measure the spectrum of light-mass hybrid mesons, and it has began its physics run in Spring 2017. For the experiment, a 12 GeV electron beam incident on a diamond radiator is used to produce a linearly-polarized, coherent bremsstrahlung tagged-photon beam with a coherent peak at 9 GeV. The linearly-polarized photon beam is incident on a proton target located within the hermetic GlueX detector, which can detect many different final states to which the hybrid mesons are predicted to decay. Measurements with these initial data are discussed, including beam asymmetry measurements, the search for photoproduced Ξ baryons, and near-threshold charm production.

Authors:
 [1]
  1. Northwestern Univ., Evanston, IL (United States)
Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
GlueX collaboration
OSTI Identifier:
1493441
Report Number(s):
JLAB-PHY-18-2674; DOE/OR/23177-4388; arXiv:1712.07214
DOE Contract Number:  
AC05-06OR23177
Resource Type:
Conference
Journal Name:
Proceedings of Science
Additional Journal Information:
Journal Volume: Hadron2017; Conference: Hadron 2017, 25-29 Sep 2017. Salamanca, Spain
Country of Publication:
United States
Language:
English

Citation Formats

Dobbs, SEan. Searching for Hybrid Mesons with GlueX. United States: N. p., 2018. Web. doi:10.22323/1.310.0047.
Dobbs, SEan. Searching for Hybrid Mesons with GlueX. United States. doi:10.22323/1.310.0047.
Dobbs, SEan. Fri . "Searching for Hybrid Mesons with GlueX". United States. doi:10.22323/1.310.0047. https://www.osti.gov/servlets/purl/1493441.
@article{osti_1493441,
title = {Searching for Hybrid Mesons with GlueX},
author = {Dobbs, SEan},
abstractNote = {Hybrid mesons consist of a quark-antiquark pair bound together by a gluonic field that is in an excited state. Measuring the spectrum of these states will provide valuable information on the gluonic degrees of freedom of QCD in the quark-confinement regime.A rich spectrum of hybrid meson states has been predicted, but only a few experiments have reported evidence of their existence. The GlueX experiment at Jefferson Lab is designed to search for and measure the spectrum of light-mass hybrid mesons, and it has began its physics run in Spring 2017. For the experiment, a 12 GeV electron beam incident on a diamond radiator is used to produce a linearly-polarized, coherent bremsstrahlung tagged-photon beam with a coherent peak at 9 GeV. The linearly-polarized photon beam is incident on a proton target located within the hermetic GlueX detector, which can detect many different final states to which the hybrid mesons are predicted to decay. Measurements with these initial data are discussed, including beam asymmetry measurements, the search for photoproduced Ξ baryons, and near-threshold charm production.},
doi = {10.22323/1.310.0047},
journal = {Proceedings of Science},
number = ,
volume = Hadron2017,
place = {United States},
year = {2018},
month = {2}
}

Conference:
Other availability
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