{
  "id": "hep-ph/0208081",
  "version": "v2",
  "published": "2002-08-08T09:18:52.000Z",
  "updated": "2002-08-12T16:00:26.000Z",
  "title": "Scalar mesons in QCD and tests of the gluon content of the sigma",
  "authors": [
    "Stephan Narison"
  ],
  "comment": "References added. Mini-review given at the QCD 02 9th International High-Energy Physics Conference in Quantum ChromoDynamics (Montpellier 2-9th July 2002)",
  "doi": "10.1016/S0920-5632(03)01828-0",
  "categories": [
    "hep-ph",
    "hep-ex",
    "hep-lat",
    "nucl-th"
  ],
  "abstract": "We summarize the different features of the scalar mesons from QCD spectral sum rule analyses of the two- and three-point functions. The results do not favour the u-bar u + d-bar d interpretation of the broad and low mass sigma (0.6), and the u-bar s resonance nature of the eventually observed kappa(0.9) meson. We also discuss some OZI-violating and classic semileptonic and radiative decay processes which can reveal in a model-independent way the eventual gluon component sigma_B of the sigma. In a meson-gluonium mixing scenario, one also expects an observation of the K K-bar final states from the sigma_B which may compete (if phase space allowed) with the one from a low mass s-bar s state assumed in the literature to be the SU(3) partner of the $\\sigma (0.6)$ if this latter is a u-bar u + d-bar d state",
  "revisions": [
    {
      "version": "v2",
      "updated": "2002-08-12T16:00:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "scalar mesons",
      "gluon content",
      "qcd spectral sum rule analyses",
      "low mass s-bar",
      "eventual gluon component"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 592222
    }
  }
}