{
  "id": "0807.4458",
  "version": "v2",
  "published": "2008-07-28T14:10:09.000Z",
  "updated": "2008-10-28T07:36:50.000Z",
  "title": "Observation of a near-threshold enhancement in the e+e- -->Lambda_c+Lambda_c- cross section using initial-state radiation",
  "authors": [
    "G. Pakhlova"
  ],
  "comment": "6 pages, 4 figures, published in PRL, presented at ICHEP2008",
  "journal": "Phys.Rev.Lett.101:172001,2008",
  "doi": "10.1103/PhysRevLett.101.172001",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We report a measurement of the exclusive e+e- -->Lambda_c+ Lambda_c- cross section as a function of center-of-mass energy near the Lambda_c+ Lambda_c- threshold. A clear peak with a significance of 8.2 sigma is observed in the Lambda_c+ Lambda_c- invariant mass distribution just above threshold. With an assumption of a resonance origin for the observed peak, a mass and width of M=(4634^{+8}_{-7}(stat.)^{+5}_{-8}(sys.))Mev/c2 and Gamma_tot=(92^{+40}_{-24}(stat.)}^{+10}_{-21}(sys.))MeV are determined. The analysis is based on a study of events with initial-state-radiation photons in a data sample collected with the Belle detector at the \\Upsilon(4S) resonance and nearby continuum with an integrated luminosity of 695/fb at the KEKB asymmetric-energy e+e- collider.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-10-28T07:36:50.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.87.Fh",
      "14.40.Gx",
      "13.66.Bc"
    ],
    "keywords": [
      "cross section",
      "initial-state radiation",
      "near-threshold enhancement",
      "observation",
      "invariant mass distribution"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2008,
      "month": "Oct",
      "volume": 101,
      "number": 17,
      "pages": 172001
    },
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 791660,
      "adsabs": "2008PhRvL.101q2001P"
    }
  }
}