{
  "id": "hep-ph/0110375",
  "version": "v3",
  "published": "2001-10-29T18:40:07.000Z",
  "updated": "2002-01-23T14:31:18.000Z",
  "title": "Next-to-Leading Order QCD Corrections to Spectator Effects in Lifetimes of Beauty Hadrons",
  "authors": [
    "M. Ciuchini",
    "E. Franco",
    "V. Lubicz",
    "F. Mescia"
  ],
  "comment": "29 pages, 7 figures, uses epsf. Misprints in eqs. (28) and (52) corrected. Results unchanged. Final version to appear on Nucl.Phys.B",
  "journal": "Nucl.Phys.B625:211-238,2002",
  "doi": "10.1016/S0550-3213(02)00006-8",
  "categories": [
    "hep-ph",
    "hep-lat"
  ],
  "abstract": "Theoretical predictions of beauty hadron lifetimes, based on the heavy quark expansion up to and including order 1/mb^2, do not to reproduce the experimental measurements of the lifetime ratios tau(B+)/tau(Bd) and tau(Lambdab)/tau(Bd). Large corrections to these predictions come from phase-space enhanced 1/mb^3 contributions, i.e. hard spectator effects. In this paper we calculate the next-to-leading order QCD corrections to the Wilson coefficients of the local operators appearing at O(1/mb^3). We find that these corrections improve the agreement with the experimental data. The lifetime ratio of charged to neutral B mesons, tau(B+)/tau(Bd), turns out to be in very good agreement with the corresponding measurement, whereas for tau(Bs)/tau(Bd) and tau(Lambdab)/tau(Bd) there is a residual difference at the 1-sigma level. We discuss, however, why the theoretical predictions are less accurate in the latter cases.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2002-01-23T14:31:18.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.40.Nd",
      "14.20.Mr",
      "14.65.Fy",
      "13.25.Hw",
      "13.30.Eg",
      "12.38.Bx",
      "12.39.Hg"
    ],
    "keywords": [
      "next-to-leading order qcd corrections",
      "lifetime ratio",
      "heavy quark expansion",
      "hard spectator effects",
      "beauty hadron lifetimes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Elsevier",
      "journal": "Nucl. Phys. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 29,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 565176
    }
  }
}