{
  "id": "0812.2832",
  "version": "v4",
  "published": "2008-12-15T15:15:53.000Z",
  "updated": "2009-04-01T18:43:21.000Z",
  "title": "S-waves and the Measurement of CP Violating Phases in Bs Decays",
  "authors": [
    "Sheldon Stone",
    "Liming Zhang"
  ],
  "comment": "To be published in Physical Review D; 7 pages, 5 figures, v2-3 fixed typo's; response to reviewers",
  "journal": "Phys. Rev. D 79, 074024 (2009)",
  "doi": "10.1103/PhysRevD.79.074024",
  "categories": [
    "hep-ph",
    "hep-ex"
  ],
  "abstract": "Heavy, as yet undiscovered particles, can affect measurements of CP violation in the B system. Measuring CP violation in the Bs system provides an excellent place to observe such effects since Standard Model sources are predicted to produce very small effects. The angle -2beta_s, the \"phase of Bs-\\bar{B}s mixing,\" thought to be best measured in Bs -> J/psi\\phi decays is of order -0.04, while the CP violating asymmetry in Bs -> \\phi\\phi is predicted to be zero, due to the cancellation of the mixing phase with the decay phase. Recent measurements of \\beta_s in J/psi\\phi, while not definitive, are much larger than the Standard Model predictions. Measurements in the B^o and Ds+ systems of analogous modes point toward a 5-10% contamination of S-wave K+K- under the \\phi peak. This S-wave was not taken into account in these recent analyses. Furthermore this S-wave can also materialize as a f0(980) meson that decays to \\pi+\\pi-, making the final state J/psi f0 useful for measuring \\beta_s with the added advantage of not requiring an angular analysis. Rate estimates, while not precise, predict four to five times fewer such events than those in the J/psi\\phi mode. The error on \\beta_s, however, may be similar. We also remark on S-wave problems with the Bs -> \\phi\\phi mode, and possible systematic checks using Bs -> \\phi f0.",
  "revisions": [
    {
      "version": "v4",
      "updated": "2009-04-01T18:43:21.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.20.He",
      "14.40.Nd",
      "13.25.Hw",
      "11.30.Er"
    ],
    "keywords": [
      "cp violating phases",
      "bs decays",
      "measurement",
      "state j/psi f0 useful",
      "final state j/psi f0"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review D",
      "year": 2009,
      "month": "Apr",
      "volume": 79,
      "number": 7,
      "pages": "074024"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 805325,
      "adsabs": "2009PhRvD..79g4024S"
    }
  }
}