{
  "id": "1207.2284",
  "version": "v3",
  "published": "2012-07-10T09:49:23.000Z",
  "updated": "2013-04-20T08:35:42.000Z",
  "title": "Measurement of the Lambda_b lifetime and mass in the ATLAS experiment",
  "authors": [
    "ATLAS Collaboration"
  ],
  "comment": "7 pages plus author list (20 pages total), 3 figures, 2 tables, submitted to Physical Review D. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/BPHY-2012-03/",
  "journal": "Phys. Rev. D 87, 032002 (2013)",
  "doi": "10.1103/PhysRevD.87.032002",
  "categories": [
    "hep-ex"
  ],
  "abstract": "A measurement of the Lambda_b lifetime and mass in the decay channel Lambda_b -> J/psi(mu^+ mu^-) Lambda^0(p pi^-) is presented. The analysis uses a signal sample of about 2200 Lambda_b and anti-Lambda_b decays that are reconstructed in 4.9 fb^-1 of ATLAS pp collision data collected in 2011 at the LHC center-of-mass energy of 7 TeV. A simultaneous mass and decay time maximum likelihood fit is used to extract the Lambda_b lifetime and mass. They are measured to be tau(Lambda_b) = 1.449 +/- 0.036(stat) +/- 0.017(syst) ps and m(Lambda_b) = 5619.7 +/- 0.7(stat) +/- 1.1(syst) MeV.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2013-04-20T08:35:42.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.20.Mr"
    ],
    "keywords": [
      "atlas experiment",
      "measurement",
      "decay time maximum likelihood fit",
      "lhc center-of-mass energy",
      "atlas pp collision data"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2013,
      "month": "Feb",
      "volume": 87,
      "number": 3,
      "pages": "032002"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1121875,
      "adsabs": "2013PhRvD..87c2002A"
    }
  }
}