{
  "id": "0909.3974",
  "version": "v1",
  "published": "2009-09-22T12:07:32.000Z",
  "updated": "2009-09-22T12:07:32.000Z",
  "title": "Generalized Dalitz Plot analysis of the near threshold pp-->ppK+K- reaction in view of the K+K- final state interaction",
  "authors": [
    "M. Silarski",
    "P. Moskal",
    "E. Czerwinski",
    "R. Czyzykiewicz",
    "D. Gil",
    "D. Grzonka",
    "L. Jarczyk",
    "B. Kamys",
    "A. Khoukaz",
    "J. Klaja",
    "P. Klaja",
    "W. Krzemien",
    "W. Oelert",
    "J. Ritman",
    "T. Sefzick",
    "M. Siemaszko",
    "J. Smyrski",
    "A. Taschner",
    "P. Winter",
    "M. Wolke",
    "P. Wustner",
    "M. Zielinski",
    "W. Zipper",
    "J. Zdebik"
  ],
  "comment": "8 pages, 7 figures, to be published in Phys. Rev. C",
  "journal": "Phys.Rev.C80:045202,2009",
  "doi": "10.1103/PhysRevC.80.045202",
  "categories": [
    "hep-ph"
  ],
  "abstract": "The excitation function for the $pp\\to ppK^+K^-$ reaction revealed a significant enhancement close to threshold which may plausibly be assigned to the influence of the $pK^-$ and $K^+K^-$ final state interactions. In an improved reanalysis of COSY-11 data for the $pp\\to ppK^+K^-$ reaction at excess energies of Q = 10 MeV and 28 MeV including the proton-K- interaction the enhancement is confirmed. Invariant mass distributions for the two- and three-particle subsystems allow to test at low excess energies the ansatz and parameters for the description of the interaction in the ppK+K- system as derived from the COSY-ANKE data. Finally, based for the first time on the low energy K+K- invariant mass distributions and the generalized Dalitz plot analysis, we estimate the scattering length for the K+K- interaction to be |Re(a_K^+K^-)| = 0.5 + 4.0 -0.5 fm and Im(a_K^+K^-) = 3.0 +- 3.0 fm.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2009-09-22T12:07:32.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "25.40.Ep",
      "13.75.Jz",
      "13.75.Lb",
      "14.40.Aq"
    ],
    "keywords": [
      "generalized dalitz plot analysis",
      "final state interaction",
      "invariant mass distributions",
      "low excess energies",
      "significant enhancement close"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review C",
      "year": 2009,
      "month": "Oct",
      "volume": 80,
      "number": 4,
      "pages": "045202"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 831871,
      "adsabs": "2009PhRvC..80d5202S"
    }
  }
}