{
  "id": "hep-ex/0501014",
  "version": "v2",
  "published": "2005-01-07T17:51:41.000Z",
  "updated": "2005-01-24T22:28:08.000Z",
  "title": "Evidence for the Decay Sigma+ -> p mu+ mu-",
  "authors": [
    "H. K. Park",
    "R. A. Burnstein",
    "A. Chakravorty",
    "Y. C. Chen",
    "W. S. Choong",
    "K. Clark",
    "E. C. Dukes",
    "C. Durandet",
    "J. Felix",
    "Y. Fu",
    "G. Gidal",
    "H. R. Gustafson",
    "T. Holmstrom",
    "M. Huang",
    "C. James",
    "C. M. Jenkins",
    "T. Jones",
    "D. M. Kaplan",
    "L. M. Lederman",
    "N. Leros",
    "M. J. Longo",
    "F. Lopez",
    "L. C. Lu",
    "W. Luebke",
    "K. B. Luk",
    "K. S. Nelson",
    "J. -P. Perroud",
    "D. Rajaram",
    "H. A. Rubin",
    "J. Volk",
    "C. G. White",
    "S. L. White",
    "P. Zyla"
  ],
  "comment": "As published in PRL",
  "journal": "Phys.Rev.Lett.94:021801,2005",
  "doi": "10.1103/PhysRevLett.94.021801",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We report the first evidence for the decay Sigma+ -> p mu+ mu- from data taken by the HyperCP experiment(E871) at Fermilab. Based on three observed events, the branching ratio is B(Sigma+ -> p,mu+,mu-) = [8.6 +6.6,-5.4(stat) +/-5.5(syst)] x 10**-8. The narrow range of dimuon masses may indicate that the decay proceeds via a neutral intermediate state, Sigma+ -> p P0, P0 -> mu+ mu-, with a P0 mass of 214.3 +/- 0.5 MeV/c**2 and branching ratio B(Sigma+ -> p P0; P0 -> mu+ mu-) = [3.1 +2.4,-1.(stat) +/-1.5(syst)] x 10**-8.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2005-01-24T22:28:08.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.80.Mz",
      "14.20.Jn",
      "13.30.Ce"
    ],
    "keywords": [
      "branching ratio",
      "neutral intermediate state",
      "data taken",
      "first evidence",
      "dimuon masses"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 674491
    }
  }
}