{
  "id": "0811.1681",
  "version": "v1",
  "published": "2008-11-11T10:52:01.000Z",
  "updated": "2008-11-11T10:52:01.000Z",
  "title": "First measurement of direct $f_0(980)$ photoproduction on the proton",
  "authors": [
    "CLAS Collaboration",
    "M. Battaglieri",
    "R. De Vita",
    "A. P. Szczepaniak"
  ],
  "journal": "Phys.Rev.Lett.102:102001,2009",
  "doi": "10.1103/PhysRevLett.102.102001",
  "categories": [
    "hep-ex"
  ],
  "abstract": "We report on the results of the first measurement of exclusive $f_0(980)$ meson photoproduction on protons for $E_\\gamma=3.0 - 3.8$ GeV and $-t = 0.4-1.0$ GeV$^2$. Data were collected with the CLAS detector at the Thomas Jefferson National Accelerator Facility. The resonance was detected via its decay in the $\\pi^+ \\pi^-$ channel by performing a partial wave analysis of the reaction $\\gamma p \\to p \\pi^+ \\pi^-$. Clear evidence of the $f_0(980)$ meson was found in the interference between $P$ and $S$ waves at $M_{\\pi^+ \\pi^-}\\sim 1$ GeV. The $S$-wave differential cross section integrated in the mass range of the $f_0(980)$ was found to be a factor of 50 smaller than the cross section for the $\\rho$ meson. This is the first time the $f_0(980)$ meson has been measured in a photoproduction experiment.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2008-11-11T10:52:01.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "13.60.Le",
      "14.40.Cs",
      "11.80.Et"
    ],
    "keywords": [
      "first measurement",
      "photoproduction",
      "thomas jefferson national accelerator facility",
      "wave differential cross section",
      "partial wave analysis"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2009,
      "month": "Mar",
      "volume": 102,
      "number": 10,
      "pages": 102001
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 802111,
      "adsabs": "2009PhRvL.102j2001B"
    }
  }
}