Glueballs as the Ithaca of meson spectroscopy

Abstract

This compact review about gluonium focuses on a slate of theoretical efforts; among the many standing works, I have selected several that are meant to assist in the identification, among ordinary mesons, of the few Yang-Mills glueball configurations that populate the energy region below 3 GeV. This includes $J/\psi$ radiative and vector-meson decays, studies of scalar meson mixing, of high-energy cross sections via the Pomeron and the odderon, glueball decays, etc. The weight of accumulated evidence seems to support the $f_0(1710)$ as having a large (and the largest) glueball component among the scalars, although no single observable by itself is conclusive. Further tests would be welcome, such as exclusive $f_J$ production at asymptotically high $s$ and $t$. No clear experimental candidates for the pseudoscalar or tensor glueball stand out yet, and continuing investigations trying to sort them out will certainly teach us much more about mesons.

27 pages, 11 figure files

References in corpus (22)

• The Physics of Glueballs
• The Experimental Status of Glueballs
• Towards the glueball spectrum from unquenched lattice QCD
• Identification of a Scalar Glueball
• Is f0(1710) a glueball?
• Scalar Glueball, Scalar Quarkonia, and their Mixing
• Measurement of the e+e- -> J/psi ccbar cross section at \sqrt{s} ~10.6 GeV
• Dynamical generation of pseudoscalar resonances
• Finding the $0^{--}$ Glueball
• Spin Zero Glueballs in the Bethe-Salpeter Formalism
• Non-ordinary light meson couplings and the $1/N_c$ expansion
• Comment on "Chiral Suppression of Scalar Glueball Decay"
• Exotic glueball $0^{\pm -}$ states in QCD Sum Rules
• Semirelativistic potential model for three-gluon glueballs
• Glueball phenomenology and the relativistic flux tube model
• Reply to Comment on "Chiral suppression of scalar glueball decay"
• Mass spectrum of pseudo-scalar glueballs from a Bethe-Salpeter approach with the rainbow-ladder truncation
• First study of the three-gluon static potential in Lattice QCD
• $0^{++}$ scalar glueball in finite-width Gaussian sum rules
• AdS gravity and glueball spectrum
• Comparison of differential elastic cross sections in $pp$ and $p\bar{p}$ collisions as evidence of the existence of the colourless $C$-odd three-gluon state
• Study of Scalar Mesons at BES-II

Cited by in corpus (14)

• Scalar isoscalar mesons and the scalar glueball from radiative $J/\psi$ decays
• Higher spin glueballs from functional methods
• Search for the tensor glueball
• Is $f_2(1950)$ the tensor glueball?
• Ordinary and exotic mesons in the extended Linear Sigma Model
• From well-known tensor mesons to yet unknown axial-tensor mesons
• Glueball-glueball scattering and the glueballonium
• Testing a Conjecture On Quantum Chromodynamics
• Spectrum of Large N Glueballs: Holography vs Lattice
• Nonlocal gluon condensates in QCD sum rules
• The radiative decay of scalar glueball from lattice QCD
• Spinning Pairs: Supporting ${}^3{P}_0$ Quark-Pair Creation from Landau Gauge Green's Functions
• Casimir scaling in glueballs in SU($N$) and Sp($2N$) gauge theories: hints from constituent approaches
• The Fragmented Glueball: A Personal View