{
  "id": "hep-ph/0108096",
  "version": "v3",
  "published": "2001-08-10T13:47:49.000Z",
  "updated": "2002-03-05T19:52:13.000Z",
  "title": "Implications of Recent $\\bar{B}^0\\to D^{(*)0}X^0$ Measurements",
  "authors": [
    "Hai-Yang Cheng"
  ],
  "comment": "17 pages. The Introduction is substantially revised and the order of the presentation in Sec. 2 is rearranged. To appear in Phys. Rev",
  "journal": "Phys.Rev. D65 (2002) 094012",
  "doi": "10.1103/PhysRevD.65.094012",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "The recent measurements of the color-suppressed modes $\\bar B^0\\to D^{(*)0}\\pi^0$ imply non-vanishing relative final-state interaction (FSI) phases among various $\\bar B\\to D\\pi$ decay amplitudes. Depending on whether or not FSIs are implemented in the topological quark-diagram amplitudes, two solutions for the parameters $a_1$ and $a_2$ are extracted from data using various form-factor models. It is found that $a_2$ is not universal: $|a_2(D\\pi)|= 0.40-0.55$ and $|a_2(D^*\\pi)|= 0.25-0.35$ with a relative phase of order $(50-55)^\\circ$ between $a_1$ and $a_2$. If FSIs are not included in quark-diagram amplitudes from the outset, $a_2^{eff}/a_1^{eff}$ and $a_2^{eff}$ will become smaller. The large value of $|a_2(D\\pi)|$ compared to $|a_2^{eff}(D\\pi)|$ or naive expectation implies the importance of long-distance FSI contributions to color-suppressed internal $W$-emission via final-state rescatterings of the color-allowed tree amplitude.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2002-03-05T19:52:13.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.25.Hw",
      "13.25.-k"
    ],
    "keywords": [
      "measurements",
      "implications",
      "long-distance fsi contributions",
      "decay amplitudes",
      "topological quark-diagram amplitudes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 17,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 561385
    }
  }
}