Experimental Status of Exotic Mesons and the GlueX Experiment

Abstract

One of the unanswered and most fundamental questions in physics regards the nature of the confinement mechanism of quarks and gluons in QCD. Exotic hybrid mesons manifest gluonic degrees of freedom and their spectroscopy will provide the data necessary to test assumptions in lattice QCD and the specific phenomenology leading to confinement. Within the past two decades a number of experiments have put forth tantalizing evidence for the existence of exotic hybrid mesons in the mass range below 2 GeV. This talk represents an overview of the available data and what has been learned. In looking toward the future, the GlueX experiment at Jefferson Laboratory represents a new initiative that will perform detailed spectroscopy of the light-quark meson spectrum. This experiment and its capabilities will be reviewed.

arXiv comment10 pages, 8 figures, 2nd Meeting of the APS Topical Group on Hadron Physics GHP06, Nashville, TN (10/22-10/24/06)

References in corpus (13)

• Observing Long Colour Flux Tubes in SU(2) Lattice Gauge Theory
• Static potentials and glueball masses from QCD simulations with Wilson sea quarks
• Evidence for Exotic Meson Production in the Reaction ${\pi }^{-}p\to \eta {\pi }^{-}p$ at 18 GeV/c
• Observation of exotic meson production in the reaction ${\pi }^{-}p\to {\eta }^{\prime }{\pi }^{-}p$ at 18 GeV/c
• Exotic Meson Production in the $f_1(1285){\pi }^{-}$ System observed in the Reaction ${\pi }^{-}p\to \eta {\pi }^{+}{\pi }^{-}{\pi }^{-}p$ at 18 GeV/c
• Exotic Meson Decay to $\omega {\pi }^0{\pi }^{-}$
• A search for J^{PC}=1^{-+} exotic mesons in the pi- pi- pi+ and pi- pi0 pi0 systems
• A partial wave analysis of the ${\pi }^{-}{\pi }^{-}{\pi }^{+}$ and ${\pi }^{-}{\pi }^0{\pi }^0$ systems and the search for a $J^{PC}=1^{-+}$ meson
• Study of the $\eta \pi$ and ${\eta }^{\prime }\pi$ spectra and interpetation of possible exotic $J^{PC}=1^{-+}$ mesons
• A Study of the ηπ^{0} Spectrum and Search for a J^{PC} = 1^{-+} Exotic Meson
• Role of Photoproduction in Exotic Meson Searches
• Exotic Meson Decay Widths using Lattice QCD
• On the possibilities to study the exotic state $1^{-+}$ in the experiments on photoproduction of the $\pi \eta$, $\pi {\eta }^{\prime }$ systems

Cited by in corpus (1)

• Higher Hybrid Charmonia in an Extended Potential Model