{
  "id": "hep-ph/0206061",
  "version": "v2",
  "published": "2002-06-06T06:29:39.000Z",
  "updated": "2002-06-09T09:40:08.000Z",
  "title": "$\\bar B^0 \\to π^+ X$ in the Standard Model",
  "authors": [
    "X. -G. He",
    "C. -P. Kao",
    "J. P. Ma",
    "S. Pakvasa"
  ],
  "comment": "RevTex 8 pages and two figures",
  "journal": "Phys.Rev.D66:097501,2002",
  "doi": "10.1103/PhysRevD.66.097501",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "In this paper we investigate the possibility of studying $B\\to \\pi$ form factor using the semi-inclusive decays $\\bar B^0 \\to \\pi^+ + X_q$. In general $B\\to PX$ semi-inclusive decays involve several hadronic parameters. But for $\\bar B^0 \\to \\pi^+ X_q$ decays we find that in the factorization approximation, the only unknown hadronic parameters are the form factors $F^{B\\to \\pi}_{0,1}$. Therefore these form factors can be studied in $\\bar B^0 \\to \\pi^+ X_q$ decays. Using theoretical model calculations for the form factors the branching ratios for $\\bar B^0 \\to \\pi^+ X_d(\\Delta S = 0) $ and $\\bar B^0 \\to \\pi^+ X_s (\\Delta S = -1)$, with the cut $E_{\\pi} > 2.1$ GeV, are estimated to be in the ranges of $(3.1\\sim 4.9) \\times 10^{-5}(F^{B\\to \\pi}_1(0)/0.33)^2$ and $(2.5\\sim 4.2)\\times 10^{-5}(F_1^{B\\to \\pi}(0)/0.33)^2$, respectively, depending on the value of $\\gamma$. The combined branching ratio for $\\bar B^0 \\to \\pi^+ (X_d+ X_s)$ is about $7.4\\times 10^{-5} (F^{B\\to \\pi}_1(0)/0.33)^2$ and is insensitive to $\\gamma$. We also discuss CP asymmetries in these decay modes.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2002-06-09T09:40:08.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "11.30.Er",
      "14.40.Nd"
    ],
    "keywords": [
      "form factor",
      "standard model",
      "branching ratio",
      "semi-inclusive decays",
      "unknown hadronic parameters"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "RevTeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 587992
    }
  }
}