{
  "id": "hep-ph/9602201",
  "version": "v1",
  "published": "1996-02-01T09:42:06.000Z",
  "updated": "1996-02-01T09:42:06.000Z",
  "title": "First Lattice Study of the Form Factors A_0 and A_3 in the Decay Bbar^0 to rho^+ l^- nubar_l",
  "authors": [
    "UKQCD Collaboration",
    "J M Flynn",
    "J Nieves"
  ],
  "comment": "14 pages LaTeX209 with 5 figures from 11 encapsulated PostScript files, using epsf.sty. Also available from http://wwwhep.phys.soton.ac.uk/hepwww/papers/shep9601/",
  "journal": "Nucl.Phys. B476 (1996) 313-328",
  "categories": [
    "hep-ph"
  ],
  "abstract": "We report on a lattice calculation of the form factors A_0 and A_3 for the pseudoscalar to vector meson semileptonic decay Bbar^0 to rho^+ l^- nubar_l. We find that resonant (or pole-type) contributions alone are unable to describe these two form factors simultaneously. For the quantity A_0(q^2=0), which is important phenomenologically for the determination of |Vub|, we extract a range of values, A_0(q^2=0) = (0.16--0.35) +0.09-0.06, where the range is due to systematic uncertainty and the quoted error is statistical. We have also determined A_2(q^2=0) = 0.28 +0.09-0.06 +0.04-0.05.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1996-02-01T09:42:06.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.20.He",
      "12.15.Hh",
      "12.38.Gc",
      "12.39.Hg"
    ],
    "keywords": [
      "form factors",
      "first lattice study",
      "vector meson semileptonic decay",
      "systematic uncertainty",
      "lattice calculation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1016/0550-3213(96)00307-0"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 14,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 415705
    }
  }
}