{
  "id": "hep-ph/0509362",
  "version": "v3",
  "published": "2005-09-30T06:25:58.000Z",
  "updated": "2006-03-03T03:35:55.000Z",
  "title": "Branching Ratio and CP Asymmetry of $B \\to ρη^{(\\prime)}$ Decays in the Perturbative QCD Approach",
  "authors": [
    "Xin Liu",
    "Huisheng Wang",
    "Zhenjun Xiao",
    "Libo Guo",
    "Caidian Lü"
  ],
  "comment": "29 pages, 9 ps figures, more phenomenological discussions added, scale dependence of computed observables are considered, typos corrected, the figures and conclusions remain unchanged",
  "journal": "Phys.Rev. D73 (2006) 074002",
  "doi": "10.1103/PhysRevD.73.074002",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "In this paper,we calculate the branching ratios and CP-violating asymmetries for $B^0 \\to \\rho^0 \\eta^{(\\prime)}$ and $B^+\\to \\rho^+ \\etap$ decays in the perturbative QCD factorization approach. In this approach, we not only calculate the usual factorizable contributions, but also evaluate the non-factorizable and annihilation type contributions. Besides the current-current operators, the contributions from the QCD and electroweak penguin operators are also taken into account. The theoretical predictions for the branching ratios are $Br(B^+ \\to \\rho^+ \\eta^{(\\prime)}) \\approx 9 \\times 10^{-6}$ and $Br(B^0 \\to \\rho^0 \\eta^{(\\prime)}) \\approx 5 \\times 10^{-8}$, which agree well with the measured values and currently available experimental upper limits. We also predict large CP-violating asymmetries in these decays: $A_{CP}^{dir}(\\rho^\\pm \\eta)\\approx -13 %$, $A_{CP}^{dir}(\\rho^\\pm \\eta^\\prime)\\approx -18 %$, $A_{CP}^{dir}(\\rho^0 \\eta)\\approx -41%$, $A_{CP}^{dir}(\\rho^0 \\eta^\\prime)\\approx -27%$, $A_{CP}^{mix}(\\rho^0 \\eta)\\approx +25%$, and $A_{CP}^{mix}(\\rho^0 \\eta^\\prime) \\approx +11%$, which can be tested by the current or future B factory experiments.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2006-03-03T03:35:55.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "12.38.Bx",
      "13.25.Hw",
      "14.40.Nd"
    ],
    "keywords": [
      "branching ratio",
      "perturbative qcd approach",
      "cp asymmetry",
      "perturbative qcd factorization approach",
      "annihilation type contributions"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 29,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 693757
    }
  }
}