{
  "id": "0910.3534",
  "version": "v1",
  "published": "2009-10-19T11:55:31.000Z",
  "updated": "2009-10-19T11:55:31.000Z",
  "title": "Measurement of the form factors of the decay B^+\\to\\bar D^{*0}\\ell^+ν_\\ell and determination of the CKM matrix element |V_{cb}|",
  "authors": [
    "The Belle Collaboration"
  ],
  "comment": "22 pages, 8 figures",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We present a measurement of the Cabibbo-Kobayashi-Maskawa matrix element $|V_{cb}|$ times the form factor normalization $\\mathcal{F}(1)$ using the decay $B^+\\to\\bar D^{*0}\\ell^+\\nu_\\ell$. This measurement is performed together with a determination of the form factor parameters $\\rho^2$, $R_1(1)$ and $R_2(1)$ which fully characterize this decay in the framework of Heavy Quark Effective Theory. This analysis is based on a data sample equivalent to 140 fb$^{-1}$ of Belle data collected near the $\\Upsilon(4S)$ resonance. The preliminary results, based on about 27,000 reconstructed $B^+\\to\\bar D^{*0}\\ell^+\\nu_\\ell$ decays, are $\\rho^2=1.376\\pm 0.074\\pm 0.056$, $R_1(1)=1.620\\pm 0.091\\pm 0.092$, $R_2(1)=0.805\\pm 0.064\\pm 0.036$ and $\\mathcal{F}(1)|V_{cb}|=35.0\\pm 0.4\\pm 2.2$. We find the $B^+\\to\\bar D^{*0}\\ell^+\\nu_\\ell$ branching fraction to be $(4.84\\pm 0.04\\pm 0.56)%$. For all numbers quoted here, the first error is the statistical and the second is the systematic uncertainty. A direct, model-independent determination of the form factor shapes has also been carried out and shows good agreement with the HQET based form factor parametrization by Caprini {\\it et al.}.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-10-19T11:55:31.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "ckm matrix element",
      "measurement",
      "determination",
      "cabibbo-kobayashi-maskawa matrix element",
      "data sample equivalent"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 834402,
      "adsabs": "2009arXiv0910.3534T"
    }
  }
}