{
  "id": "hep-ex/0110033",
  "version": "v1",
  "published": "2001-10-16T19:54:46.000Z",
  "updated": "2001-10-16T19:54:46.000Z",
  "title": "Observation of the Decay K- -> pi- mu+ mu- and Measurements of the Branching Ratios for K+/- -> pi+/- mu+ mu-",
  "authors": [
    "H. K. Park"
  ],
  "comment": "4 pages, 4 figures, submitted to PRL",
  "journal": "Phys.Rev.Lett.88:111801,2002",
  "doi": "10.1103/PhysRevLett.88.111801",
  "categories": [
    "hep-ex"
  ],
  "abstract": "Using data collected with the HyperCP (E871) spectrometer during the 1997 fixed-target run at Fermilab, we report the first observation of the decay K- -> pi- mu+ mu- and new measurements of the branching ratios for K+/- -> pi+/- mu+ mu- . By combining the branching ratios for the K+ and K- decays, we measure the ratio (K+/- -> pi+/- mu+ mu-)/(K+/- -> all) = (9.8 +/- 1.0 +/- 0.5)x10^(-8). The CP asymmetry between the K+ and K- decay modes = -0.02 +/- 0.11 +/- 0.04.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-10-16T19:54:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "branching ratios",
      "measurements",
      "fixed-target run",
      "first observation",
      "cp asymmetry"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 564416
    }
  }
}