{
  "id": "hep-ex/0207076",
  "version": "v1",
  "published": "2002-07-25T09:56:16.000Z",
  "updated": "2002-07-25T09:56:16.000Z",
  "title": "Determination of the Branching Fraction for Inclusive Decays B -> X_{s} gamma",
  "authors": [
    "B. Aubert",
    "BaBar Collaboration"
  ],
  "comment": "15 pages 5 figures",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We present a preliminary determination of the inclusive branching fraction for the rare radiative penguin transition B -> X_{s} gamma. The measurement is based on a data sample of 60 million BB pairs collected between 1999 and 2001 with the BaBar detector at the PEPII asymmetric-energy e+e- B Factory at SLAC. We study events containing a high-energy photon from one B (or Bbar) decay and a tagging primary lepton from the decay of the other B meson. By this means, we are able to reduce a significant component of the background without introduction of model dependent uncertainties in the event selection efficiency. We determine the branching fraction BR(B->X_{s} gamma)=3.88 +-0.36(stat.)+-0.37(sys.) +0.43-0.23(model.)x10^{-4}, which is consistent with Standard Model predictions and provides a constraint on possible new physics contributions to the electromagnetic penguin amplitude in B decays.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-07-25T09:56:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "branching fraction",
      "inclusive decays",
      "rare radiative penguin transition",
      "model dependent uncertainties",
      "event selection efficiency"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 591318,
      "adsabs": "2002hep.ex....7076A"
    }
  }
}