{
  "id": "0810.0358",
  "version": "v3",
  "published": "2008-10-02T09:26:09.000Z",
  "updated": "2009-12-09T18:59:42.000Z",
  "title": "Study of the $B\\to X(3872)(\\to D^{*0}\\bar D^0)K$ decay",
  "authors": [
    "T. Aushev",
    "N. Zwahlen",
    "for the Belle Collaboration"
  ],
  "comment": "7 pages, 3 figures, BELLE-CONF-0832 contributed to ICHEP 2008, revised and submitted to Phys. Rev. D RC",
  "doi": "10.1103/PhysRevD.81.031103",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We present a study of $B\\to X(3872)K$ with X(3872) decaying to $D^{*0}\\bar D^0$ using a sample of 657 million $B\\bar B$ pairs recorded at the $\\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. Both $D^{*0}\\to D^0\\gamma$ and $D^{*0}\\to D^0\\pi^0$ decay modes are used. We find a peak of $50.1^{+14.8}_{-11.1}$ events with a mass of $(3872.9^{+0.6 +0.4}_{-0.4 -0.5}){\\rm MeV}/c^2$, a width of $(3.9^{+2.8 +0.2}_{-1.4 -1.1}){\\rm MeV}/c^2$ and a product branching fraction ${\\cal B}(B\\to X(3872)K)\\times{\\cal B}(X(3872)\\to D^{*0}\\bar D^0)=(0.80\\pm0.20\\pm0.10)\\times10^{-4}$, where the first errors are statistical and the second ones are systematic. The significance of the signal is $6.4\\sigma$. The difference between the fitted mass and the $D^{*0}\\bar D^0$ threshold is calculated to be $(1.1^{+0.6 +0.1}_{-0.4 -0.3}){\\rm MeV}/c^2$. We also obtain an upper limit on the product of branching fractions ${\\cal B}(B\\to Y(3940)K)\\times{\\cal B}(Y(3940)\\to D^{*0}\\bar D^0)$ of $0.67\\times10^{-4}$ at 90% CL.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2009-12-09T18:59:42.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.40.Gx",
      "13.25.Hw",
      "12.39.Mk",
      "14.40.Rt"
    ],
    "keywords": [
      "decay modes",
      "upper limit",
      "belle detector",
      "product branching fraction",
      "kekb asymmetric-energy"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2010,
      "month": "Feb",
      "volume": 81,
      "number": 3,
      "pages": "031103"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 798279,
      "adsabs": "2010PhRvD..81c1103A"
    }
  }
}