{
  "id": "hep-ex/0601029",
  "version": "v2",
  "published": "2006-01-17T09:07:44.000Z",
  "updated": "2006-04-19T01:49:31.000Z",
  "title": "Improved Constraints on D0-D0bar Mixing in D0 -> K+ pi- Decays from the Belle Detector",
  "authors": [
    "L. M. Zhang",
    "Z. P. Zhang",
    "J. Li",
    "for the Belle Collaboration"
  ],
  "comment": "6 pages, 3 figures, 1 table; replaced with the version of Phys. Rev. Lett",
  "journal": "Phys.Rev.Lett.96:151801,2006",
  "doi": "10.1103/PhysRevLett.96.151801",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We report the results of a search for D0-D0bar mixing in D0 -> K+ pi- decays based on 400 fb^{-1} of data accumulated by the Belle detector at KEKB. Both assuming CP conservation and allowing for CP violation, we fit the decay-time distribution for the mixing parameters x' and y', as well as for the parameter R_D, the ratio of doubly-Cabibbo-suppressed decays to Cabibbo-favored decays. The 95% confidence level region in the (x'^2,y') plane is obtained using a frequentist method. Assuming CP conservation, we find x'^2<0.72 x 10^{-3} and -9.9 x 10^{-3}<y'<6.8 x 10^{-3} at the 95% confidence level; these are the most stringent constraints on the mixing parameters to date. The no-mixing point (0,0) has a confidence level of 3.9%. Assuming no mixing, we measure R_D=(0.377+-0.008+-0.005)%.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2006-04-19T01:49:31.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "12.15.Ff",
      "11.30.Er",
      "13.25.Ft"
    ],
    "keywords": [
      "belle detector",
      "d0-d0bar mixing",
      "assuming cp conservation",
      "mixing parameters",
      "confidence level region"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 708708
    }
  }
}