{
  "id": "hep-ph/9706501",
  "version": "v1",
  "published": "1997-06-25T11:49:12.000Z",
  "updated": "1997-06-25T11:49:12.000Z",
  "title": "Penguin Diagrams, Charmless B-Decays and the ``Missing Charm Puzzle''",
  "authors": [
    "Alexander Lenz",
    "Ulrich Nierste",
    "Gaby Ostermaier"
  ],
  "comment": "22 pages, 7 figures, LaTex 2e, uses jeep.sty, a4wide.sty, a4.sty, fancyheadings.sty, cite.sty, epsf.sty, rotate.sty, times.sty. PostScript also available from ftp://feynman.t30.physik.tu-muenchen.de/pub/preprints/tum-hep-274-97.ps.gz",
  "journal": "Phys.Rev. D56 (1997) 7228-7239",
  "doi": "10.1103/PhysRevD.56.7228",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We calculate the contributions of penguin diagrams with internal u or c quarks to various inclusive charmless B-decay rates. Further we analyze the influence of the chromomagnetic dipole operator Q_8 on these rates. We find that the rates corresponding to B-bar --> X_{u u-bar s}, B-bar --> X_{d d-bar s}, B-bar --> X_{s s-bar s}, B-bar --> X_{s s-bar d} and B --> X_{d d-bar d} are dominated by the new penguin contributions. The contributions of Q_8 sizably diminish these rates. Despite of an increase of the total charmless decay rate by 36 % the new contributions are not large enough to explain the charm deficit observed by ARGUS and CLEO. We predict n_c=1.33 +/- 0.06 for the average number of charmed particles per B-decay in the Standard Model. Then the hypothesis of an enhancement of the chromomagnetic dipole coefficient C_8 by new physics contributions is analyzed. We perform a model independent fit of C_8 to the experimental data. If the CKM structure of the new physics contribution is the same as in the Standard Model, |C_8(M_W)| must be enhanced by a factor of 9 to 16 in order to explain the observed charm deficit.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-06-25T11:49:12.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.20.He",
      "12.38.Bx",
      "13.25.Hw",
      "12.39.Hg"
    ],
    "keywords": [
      "missing charm puzzle",
      "penguin diagrams",
      "charmless b-decay",
      "physics contribution",
      "standard model"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 444752
    }
  }
}