{
  "id": "hep-ph/9701316",
  "version": "v1",
  "published": "1997-01-18T05:54:37.000Z",
  "updated": "1997-01-18T05:54:37.000Z",
  "title": "Measuring of $|V_{ub}|$ in the forthcoming decade",
  "authors": [
    "C. S. Kim"
  ],
  "comment": "9 pages(LaTeX), 1 Postscript figure",
  "journal": "Nucl.Phys.Proc.Suppl. 59 (1997) 114-121",
  "doi": "10.1016/S0920-5632(97)00433-7",
  "categories": [
    "hep-ph"
  ],
  "abstract": "I first introduce the importance of measuring V_ub precisely. Then, from a theoretician's point of view, I review (a) past history, (b) present trials, and (c) possible future alternatives on measuring |V_ub| and/or |V_ub/V_cb|. As of my main topic, I introduce a model-independent method, which predicts \\Gamma(B -> X_u l \\nu) / \\Gamma(B -> X_c l \\nu) \\equiv (\\gamma_u / \\gamma_c) \\times | V_{ub} / V_{cb}|^2 \\simeq (1.83 \\pm 0.28) \\times |V_ub / V_cb|^2 and |V_ub/V_cb| \\equiv (\\gamma_c / \\gamma_u)^{1/2} \\times [{\\cal{B}}(B -> X_u l \\nu)/{\\cal{B}}(B -> X_c l \\nu)]^{1/2} \\simeq (0.74 \\pm 0.06) \\times [{\\cal{B}}(B -> X_u l \\nu)/ {\\cal{B}}(B -> X_c l \\nu)]^{1/2}, based on the heavy quark effective theory. I also explore the possible experimental options to separate B -> X_u l \\nu from the dominant B -> X_c l \\nu: the measurement of inclusive hadronic invariant mass distributions, and the `D - \\pi' (and `K - \\pi') separation conditions. I also clarify the relevant experimental backgrounds.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1997-01-18T05:54:37.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "forthcoming decade",
      "inclusive hadronic invariant mass distributions",
      "heavy quark effective theory",
      "relevant experimental backgrounds",
      "experimental options"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "LaTeX",
      "pages": 9,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 439668
    }
  }
}