{
  "id": "hep-lat/0002025",
  "version": "v1",
  "published": "2000-02-21T15:57:15.000Z",
  "updated": "2000-02-21T15:57:15.000Z",
  "title": "Mixing of B mesons and Decay Constants with the Non-Perturbatively Improved Action",
  "authors": [
    "D. Becirevic",
    "D. Meloni",
    "A. Retico",
    "V. Gimenez",
    "L. Giusti",
    "V. Lubicz",
    "G. Martinelli"
  ],
  "comment": "21 pages (LaTeX2e), 5 PostScript figures",
  "journal": "Nucl.Phys. B618 (2001) 241-258",
  "doi": "10.1016/S0550-3213(01)00482-5",
  "categories": [
    "hep-lat",
    "hep-ex",
    "hep-ph"
  ],
  "abstract": "Several quantities relevant to phenomenological studies of the mixing of neutral B mesons are computed on the lattice. Our main results are: f_{Bd} sqrt(B_{Bd})=206(28)(7) MeV, f_{Bs} sqrt(B_{Bs})/f_{Bd}sqrt(B_{Bd})=1.16(7). We also obtain the related quantities f_{Bs}sqrt(B{Bs})=237(18)(8) MeV, f_{Bd}= 174(22)(+7-0)(-4-0) MeV, f_{Bs}= 204(15)(+7-0)(+3-0) MeV, f_{Bs}/f_{Bd}=1.17(4)(+0-1), f_{Bd}/f_{Ds}=0.74(5). After combining our results with the experimental world average (Delta m_d), we predict (Delta m_s)=15.8(2.1)(3.3) ps^{-1}. We have also computed the relevant parameters for mixing of neutral D mesons which may be useful in some extensions of the Standard Model. All the quantities were obtained from a quenched simulation with a non-perturbatively improved Clover action at beta=6.2, corresponding to a lattice spacing 1/a=2.7(1) GeV, on a sample of 200 gauge-field configurations. A discussion of the main systematic errors is also presented.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2000-02-21T15:57:15.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.15.Ha",
      "12.38.Gc",
      "13.75.Lb"
    ],
    "keywords": [
      "decay constants",
      "experimental world average",
      "main systematic errors",
      "main results"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Elsevier",
      "journal": "Nucl. Phys. B"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 21,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 524143
    }
  }
}