{
  "id": "hep-ph/9406202",
  "version": "v2",
  "published": "1994-06-01T10:09:58.000Z",
  "updated": "1994-06-02T14:37:15.000Z",
  "title": "On the Determination of $a_1$ and $a_2$ from Hadronic Two Body $B$ Decays",
  "authors": [
    "M. Gourdin",
    "A. M Kamal",
    "Y. Y. Keum",
    "X. Y. Pham"
  ],
  "comment": "9pages(Latex)+4 figures(PS file appended), PAR/LPTHE/94-22",
  "journal": "Phys.Lett. B333 (1994) 507-513",
  "doi": "10.1016/0370-2693(94)90175-9",
  "categories": [
    "hep-ph"
  ],
  "abstract": "{}From Class I decays : $B^o \\ra \\pi^+ ( \\rho^+ ) + D^- ( {D^*}^- )$, we determine $a_1$, and from Class III decays : $B^+ \\ra \\pi^+ ( \\rho^+ ) + \\ol{D}^o ( {\\ol{D}^*}^o )$, we determine an allowed domain in the $( a_1, a_2 )$ plane. We find that within one standard deviation errors, the allowed band of $a_1$ from Class I decays is at least three standard deviations removed from the allowed domain $( a_1, a_2 )$ from Class III decays.If we expand the experimental errors to two standard deviations we do find a small intersection between the $a_1$ band and the allowed $( a_1, a_2 )$ domain. The results usually quoted in the literature lie in this intersection. We suggest : (1) an independent measurement of the branching ratio for the Class III decay, $B^+ \\ra \\rho^+ \\ol{D}^o $, (2) a high-statistics measurement of the branching ratio of the Class I decay, $B \\ra \\ol{D} ( \\ol{D}^* ) + D_s ( D_s^* )$ in both charged states, and (3) a measurement of the longitudinal polarization fraction in the Class III decay $B^+ \\ra \\rho^+ {\\ol{D}^*}^o $ to shed more light on the questions involved .",
  "revisions": [
    {
      "version": "v2",
      "updated": "1994-06-02T14:37:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "determination",
      "longitudinal polarization fraction",
      "branching ratio",
      "standard deviation errors",
      "intersection"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 373815
    }
  }
}