{
  "id": "hep-ph/9908423",
  "version": "v1",
  "published": "1999-08-20T04:57:17.000Z",
  "updated": "1999-08-20T04:57:17.000Z",
  "title": "Origins of the baryon spectrum",
  "authors": [
    "L. Ya. Glozman"
  ],
  "comment": "Plenary talk given at PANIC 99 (XV Particles and Nuclei International Conference, 10 - 16 June 1999, Uppsala)",
  "journal": "Nucl.Phys. A663 (2000) 103-112",
  "doi": "10.1016/S0375-9474(99)00578-3",
  "categories": [
    "hep-ph",
    "nucl-th"
  ],
  "abstract": "I begin with a key problem of light and strange baryon spectroscopy which suggests a clue for our understanding of underlying dynamics. Then I discuss spontaneous breaking of chiral symmetry in QCD, which implies that at low momenta there must be quasiparticles - constituent quarks with dynamical mass, which should be coupled to other quasiparticles - Goldstone bosons. Then it is natural to assume that in the low-energy regime the underlying dynamics in baryons is due to Goldstone boson exchange (GBE) between constituent quarks. Using as a prototype of the microscopical quark-gluon degrees of freedom the instanton-induced 't Hooft interaction I show why the GBE is so important. When the 't Hooft interaction is iterated in the qq t-channel it inevitably leads to a pole which corresponds to GBE. This is a typical antiscreening behavior: the interaction is represented by a bare vertex at large momenta, but it blows up at small momenta in the channel with GBE quantum numbers, explaining thus a distinguished role of the latter interaction in the low-energy regime. I show how the explicitly flavour-dependent short-range part of the GBE interaction between quarks, perhaps in combination with the vector-meson exchange interaction, solves a key problem of baryon spectroscopy and present spectra obtained in a simple analytical calculation as well as in exact semirelativistic three-body approach.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1999-08-20T04:57:17.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "baryon spectrum",
      "exact semirelativistic three-body approach",
      "constituent quarks",
      "hooft interaction",
      "low-energy regime"
    ],
    "tags": [
      "conference paper",
      "journal article"
    ],
    "publication": {
      "publisher": "Elsevier",
      "journal": "Nucl. Phys. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 505934
    }
  }
}