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Nature of the light scalar mesons

Authors
  • Vijande, J.
  • Valcarce, A.
  • Fernandez, F.
  • Silvestre-Brac, B.
Publication Date
Jan 01, 2005
Source
HAL-IN2P3
Keywords
Language
English
License
Unknown
External links

Abstract

Despite the apparent simplicity of meson spectroscopy, light scalar mesons cannot be accommodated in the usual $q\bar q$ structure. We study the description of the scalar mesons below 2 GeV in terms of the mixing of a chiral nonet of tetraquarks with conventional $q\bar q$ states. A strong diquark-antidiquark component is found for several states. The consideration of a glueball as dictated by quenched lattice QCD drives a coherent picture of the isoscalar mesons.

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