{
  "id": "hep-ph/0204140",
  "version": "v1",
  "published": "2002-04-12T14:52:47.000Z",
  "updated": "2002-04-12T14:52:47.000Z",
  "title": "A new model-independent way of extracting |V_ub/V_cb|",
  "authors": [
    "Ugo Aglietti",
    "Marco Ciuchini",
    "Paolo Gambino"
  ],
  "comment": "20 pages, 3 figs",
  "journal": "Nucl.Phys.B637:427-444,2002",
  "doi": "10.1016/S0550-3213(02)00464-9",
  "categories": [
    "hep-ph"
  ],
  "abstract": "The ratio between the photon spectrum in B -> X_s gamma and the differential semileptonic rate wrt the hadronic variable M_X/E_X is a short-distance quantity calculable in perturbation theory and independent of the Fermi motion of the b quark in the B meson. We present a NLO analysis of this ratio and show how it can be used to determine |V_ub/V_cb| independently of any model for the shape function. We also discuss how this relation can be used to test the validity of the shape-function theory on the data.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-04-12T14:52:47.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "model-independent way",
      "differential semileptonic rate wrt",
      "extracting",
      "photon spectrum",
      "perturbation theory"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Elsevier",
      "journal": "Nucl. Phys. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 585334
    }
  }
}