The Experimental Status of Glueballs
Dec, 2008Citations per year
Abstract: (arXiv)
Glueballs and other resonances with large gluonic components are predicted as bound states by Quantum Chromodynamics (QCD). The lightest (scalar) glueball is estimated to have a mass in the range from 1 to 2 GeV/c**2/ a pseudoscalar and tensor glueball are expected at higher masses. Many different experiments exploiting a large variety of production mechanisms have presented results in recent years on light mesons with J(PC) = 0(++), 0(-+), and 2(++) quantum numbers. This review looks at the experimental status of glueballs. Good evidence exists for a scalar glueball which is mixed with nearby mesons, but a full understanding is still missing. Evidence for tensor and pseudoscalar glueballs are weak at best. Theoretical expectations of phenomenological models and QCD on the lattice are briefly discussed.Note:
- 62 pages, 26 figures
- review: experimental results
- glueball: pseudoscalar
- glueball: tensor
- glueball: scalar
- quantum chromodynamics
- lattice
- meson: hadron spectroscopy
- glueball: mass
- hadron hadron: interaction
- electron positron: annihilation
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