The Experimental Status of Glueballs

Dec, 2008
62 pages
Published in:
  • Prog.Part.Nucl.Phys. 63 (2009) 74-116
e-Print:

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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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