2018/05/23 by Shu-Sheng Xu, Zhu-Fang Cui, Lei Chang +3 · 25 citations
Physics and Astronomy · #Diquark #Field (mathematics) #Meson #Particle physics theoretical and experimental studies #Perspective (graphical) #Quantum #Quantum Chromodynamics and Particle Interactions #Quantum and Classical Electrodynamics #Quantum field theory #Spectrum (functional analysis) #hep-ex #hep-lat #hep-ph #nucl-ex #nucl-th
paper · pdf · doi:10.1140/epja/i2019-12805-4
published in The European Physical Journal A 55(7) (Springer Science+Business Media) · 5 pages, 2 figures, 1 table
arxiv created 2018/05/23 · openalex created_date 2018/06/01 · openalex publication_date 2019/07/01 · arxiv updated 2019/09/04 · openalex updated_date 2026/08/05
We introduce a novel approach to the hybrid-meson (valence-gluon+quark+antiquark) bound-state problem in relativistic quantum field theory. Exploiting the existence of strong two-body correlations in the gluon-quark, qg = [gq] qg=[gq], and gluon-antiquark, qg = [gq] q¯g=[gq¯] channels, we argue that a sound description of hybrids can be obtained by solving a coupled pair of effectively two-body equations; and, consequently, that hybrids may be viewed as highly correlated qg q ↔ q qg qgq¯↔qq¯g bound states. Analogies may be drawn between this picture of hybrid structure and that of baryons, in which diquark (quark+quark) correlations play a key role. The potential of this formulation is illustrated by calculating the spectrum of light-quark isovector hybrid mesons.