{
  "id": "hep-ph/0205269",
  "version": "v1",
  "published": "2002-05-23T20:31:39.000Z",
  "updated": "2002-05-23T20:31:39.000Z",
  "title": "Constraints on the Variations of the Fundamental Couplings",
  "authors": [
    "Keith A. Olive",
    "Maxim Pospelov",
    "Yong-Zhong Qian",
    "Alain Coc",
    "Michel Casse",
    "Elisabeth Vangioni-Flam"
  ],
  "comment": "25 pages, latex, 5 eps figures",
  "journal": "Phys.Rev.D66:045022,2002",
  "doi": "10.1103/PhysRevD.66.045022",
  "categories": [
    "hep-ph",
    "astro-ph"
  ],
  "abstract": "We reconsider several current bounds on the variation of the fine-structure constant in models where all gauge and Yukawa couplings vary in an interdependent manner, as would be expected in unified theories. In particular, we re-examine the bounds established by the Oklo reactor from the resonant neutron capture cross-section of 149Sm. By imposing variations in \\Lambda_{QCD} and the quark masses, as dictated by unified theories, the corresponding bound on the variation of the fine-structure constant can be improved by about 2 orders of magnitude in such theories. In addition, we consider possible bounds on variations due to their effect on long lived \\alpha- and \\beta-decay isotopes, particularly 147Sm and 187Re. We obtain a strong constraint on \\Delta \\alpha / \\alpha, comparable to that of Oklo but extending to a higher redshift corresponding to the age of the solar system, from the radioactive life-time of 187Re derived from meteoritic studies. We also analyze the astrophysical consequences of perturbing the decay Q values on bound state \\beta-decays operating in the s-process.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-05-23T20:31:39.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "95.30.Cq",
      "12.60.-i"
    ],
    "keywords": [
      "fundamental couplings",
      "constraint",
      "resonant neutron capture cross-section",
      "fine-structure constant",
      "unified theories"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 25,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 587257
    }
  }
}