η\eta′ and η\eta mesons with connection to anomalous glue

Oct 29, 2018
23 pages
Published in:
  • Rev.Mod.Phys. 91 (2019) 1, 015003
  • Published: Feb 16, 2019
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Abstract: (APS)
A review of the present understanding of η′ and η meson physics and these mesons as a probe of gluon dynamics in low-energy QCD is presented. Recent highlights include the production mechanism of η and η′ mesons in proton-nucleon collisions from threshold to high energy, the η′ effective mass shift in the nuclear medium, searches for possible η and η′ bound states in nuclei, as well as precision measurements of η decays as a probe of light-quark masses. Recent experimental data, theoretical interpretation of the different measurements, and the open questions and challenges for future investigation are discussed.
Note:
  • Review, 25 pages, 11 figures, to appear in Reviews of Modern Physics
  • Submitted to Rev.Mod.Phys.
  • Nuclear physics
  • eta: decay
  • eta(958): mass
  • quantum chromodynamics
  • energy: low
  • eta: production
  • nuclear matter
  • bound state
  • p nucleon: scattering
  • gluon
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