Latest results from GlueX

Britton, Thomas

doi:10.1051/epjconf/201919901004

Latest results from GlueX

Journal Article · Thu Jan 31 23:00:00 EST 2019 · EPJ Web of Conferences (Online)

DOI:https://doi.org/10.1051/epjconf/201919901004· OSTI ID:1496583

Britton, Thomas ^[1]

Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

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. $$q\bar{q}g$$), 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. Here in these proceedings, we will present an overview of the GlueX experiment, its goals, current physics results, and future plans.

Research Organization:: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: AC05-06OR23177

OSTI ID:: 1496583

Report Number(s):: JLAB-PHY--18-2791; DOE/OR/23177--4528

Journal Information:: EPJ Web of Conferences (Online), Journal Name: EPJ Web of Conferences (Online) Vol. 199; ISSN 2100-014X

Publisher:: EDP SciencesCopyright Statement

Country of Publication:: United States

Language:: English

References (12)

A schematic model of baryons and mesons Gell-Mann, M. Physics Letters, Vol. 8, Issue 3 https://doi.org/10.1016/S0031-9163(64)92001-3	journal	February 1964
Studies with cathode drift chambers for the GlueX experiment at Jefferson Lab Pentchev, L.; Barbosa, F.; Berdnikov, V. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 845 https://doi.org/10.1016/j.nima.2016.04.076	journal	February 2017
Design and construction of a high-energy photon polarimeter Dugger, M.; Ritchie, B. G.; Sparks, N. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 867 https://doi.org/10.1016/j.nima.2017.05.026	journal	September 2017
Construction and performance of the barrel electromagnetic calorimeter for the GlueX experiment Beattie, T. D.; Foda, A. M.; Henschel, C. L. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 896 https://doi.org/10.1016/j.nima.2018.04.006	journal	July 2018
Confirmation of the 1−+ meson exotics in the ηπ0 system Adams, G. S.; Adams, T.; Bar-Yam, Z. Physics Letters B, Vol. 657, Issue 1-3 https://doi.org/10.1016/j.physletb.2007.07.068	journal	November 2007
Odd and even partial waves of η π − and η ′ π − in π − p → η ( ′ ) π − p at 191 GeV / c Adolph, C.; Akhunzyanov, R.; Alexeev, M. G. Physics Letters B, Vol. 740 https://doi.org/10.1016/j.physletb.2014.11.058	journal	January 2015
The GlueX DIRC project Stevens, J.; Barbosa, F.; Bessuille, J. Journal of Instrumentation, Vol. 11, Issue 07 https://doi.org/10.1088/1748-0221/11/07/C07010	journal	July 2016
Measurement of the beam asymmetry Σ for π 0 and η photoproduction on the proton at E γ = 9 GeV Al Ghoul, H.; Anassontzis, E. G.; Austregesilo, A. Physical Review C, Vol. 95, Issue 4 https://doi.org/10.1103/PhysRevC.95.042201	journal	April 2017
Toward the excited isoscalar meson spectrum from lattice QCD Dudek, Jozef J.; Edwards, Robert G.; Guo, Peng Physical Review D, Vol. 88, Issue 9 https://doi.org/10.1103/PhysRevD.88.094505	journal	November 2013
Formation of hidden-charm pentaquarks in photon-nucleon collisions Kubarovsky, V.; Voloshin, M. B. Physical Review D, Vol. 92, Issue 3 https://doi.org/10.1103/PhysRevD.92.031502	journal	August 2015
Observation of J / ψ p Resonances Consistent with Pentaquark States in Λ b 0 → J / ψ K − p Decays Aaij, R.; Adeva, B.; Adinolfi, M. Physical Review Letters, Vol. 115, Issue 7 https://doi.org/10.1103/PhysRevLett.115.072001	journal	August 2015
Study of the ρ ′ ( 1600 ) Mass Region Using γ p → π + π − p at 20 GeV Abe, K.; Bacon, T. C.; Ballam, J. Physical Review Letters, Vol. 53, Issue 8 https://doi.org/10.1103/PhysRevLett.53.751	journal	August 1984