{
  "id": "0912.0543",
  "version": "v1",
  "published": "2009-12-02T22:20:21.000Z",
  "updated": "2009-12-02T22:20:21.000Z",
  "title": "The f_{D_s} Puzzle",
  "authors": [
    "Andreas S. Kronfeld"
  ],
  "comment": "7 pp.; 1 fig.; prepared for the XXIX Physics in Collision, Kobe, Japan, August 30 - September 2, 2009",
  "categories": [
    "hep-ph",
    "hep-ex",
    "hep-lat"
  ],
  "abstract": "Recent measurements of the branching fraction for D_s -> l nu disagree with the Standard Model by around 2sigma. In this case the key aspect of the Standard Model is the calculation of the decay constant, f_{D_s}, with lattice QCD. This talk surveys the experimental measurements, and explains how the lattice QCD calculations are done. Should the discrepancy strengthen again (it was earlier 3.8sigma), it would be a signal of new physics. Models that could explain such an effect are also discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-12-02T22:20:21.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "standard model",
      "lattice qcd calculations",
      "decay constant",
      "nu disagree",
      "talk surveys"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 838857,
      "adsabs": "2009arXiv0912.0543K"
    }
  }
}