{
  "id": "hep-ex/0507023",
  "version": "v2",
  "published": "2005-07-06T07:11:47.000Z",
  "updated": "2005-07-07T17:40:36.000Z",
  "title": "Evidence for B+ -> K0barK+ and B0 -> K0K0bar, and Measurement of the Branching Fraction and Search for Direct CP Violation in B+ -> K0pi+",
  "authors": [
    "BaBar Collaboration",
    "B. Aubert"
  ],
  "comment": "7 pages, 1 figure, 1 table, submitted to Physical Review Letters",
  "journal": "Phys.Rev.Lett.95:221801,2005",
  "doi": "10.1103/PhysRevLett.95.221801",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We present evidence for the b -> d penguin-dominated decays B+ -> K0barK+ and B0 -> K0K0bar with significances of 3.5 and 4.5 standard deviations, respectively. The results are based on a sample of 227 million Y(4S) -> BBbar decays collected with the BaBar detector at the PEP-II asymmetric-energy e+e- collider at SLAC. We measure the branching fractions Br(B+ -> K0barK+) = (1.5 +- 0.5 +- 0.1) x 10^{-6} (< 2.4 x 10^{-6}) and Br(B0 -> K0K0bar) = (1.19^{+0.40}_{-0.35} +- 0.13) x 10^{-6}, where the uncertainties are statistical and systematic, respectively, and the upper limit on the branching fraction for K0barK+ is at the 90% confidence level. We also present improved measurements of the charge-averaged branching fraction Br(B+ -> K0pi+) = (26.0 +- 1.3 +- 1.0) x 10^{-6} and CP-violating charge asymmetry A_CP(K0pi+) = -0.09 +- 0.05 +- 0.01, where the uncertainties are statistical and systematic, respectively.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2005-07-07T17:40:36.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.30.Er",
      "12.15.Hh",
      "13.25.Hw"
    ],
    "keywords": [
      "branching fraction",
      "direct cp violation",
      "measurement",
      "uncertainties",
      "standard deviations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 686795
    }
  }
}