{
  "id": "hep-ex/0207079",
  "version": "v1",
  "published": "2002-07-25T13:52:50.000Z",
  "updated": "2002-07-25T13:52:50.000Z",
  "title": "Measurement of B0->Ds(*)+D*- branching fractions and polarization in the decay B0->Ds*+D*- with a partial reconstruction technique",
  "authors": [
    "The BABAR Collaboration",
    "B. Aubert"
  ],
  "comment": "22 pages, 10 postscript figues, submitted to ICHEP2002",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We present measurements of the decays B0->Ds(*)+D*-, using data recorded by the BABAR detector in 1999 and 2000, consisting of 20.8 fb^-1. The analysis is conducted with a partial reconstruction technique, in which only the Ds(*)+ and the soft pion from the D*- decay are reconstructed. From the observed rates, we measure the branching fractions BR(B0->Ds+D*-) = (1.03 +- 0.14 +- 0.13 +- 0.26)% and BR(B0->Ds*+D*-) = (1.97 +- 0.15 +- 0.30 +- 0.49)%, where the first error is statistical, the second is systematic, and the third is the error due to the Ds+->phi pi+ branching fraction uncertainty. From the B0->Ds*+D*- angular distributions, we measure the fraction of longitudinal polarization Gamma_L/Gamma = (51.9 +- 5.0 +- 2.8)%, which is consistent with the theoretical prediction, based on factorization. These results are preliminary.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2002-07-25T13:52:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "partial reconstruction technique",
      "measurement",
      "babar detector",
      "first error",
      "branching fraction uncertainty"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 22,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 591321,
      "adsabs": "2002hep.ex....7079T"
    }
  }
}