{
  "id": "nucl-th/0310087",
  "version": "v1",
  "published": "2003-10-30T20:51:24.000Z",
  "updated": "2003-10-30T20:51:24.000Z",
  "title": "Pentaquark $Θ^+$ production from the reaction $γ p\\toπ^+K^-Θ^+$",
  "authors": [
    "W. Liu",
    "C. M. Ko",
    "V. Kubarovsky"
  ],
  "comment": "15 pages, 7 figures",
  "journal": "Phys.Rev. C69 (2004) 025202",
  "doi": "10.1103/PhysRevC.69.025202",
  "categories": [
    "nucl-th"
  ],
  "abstract": "The cross section for $\\Theta^+$ production from the reaction $\\gamma p\\to\\pi^+K^-\\Theta^+$, which was observed in the CLAS experiment at the Jefferson National Laboratory, is evaluated in a hadronic model that includes couplings of $\\Theta^+$ to both $KN$ and $K^*N$. With their coupling constants determined from the empirical $\\pi NN(1710)$ and $\\rho NN(1710)$ coupling constants using the SU(3) symmetry, the cross section for this reaction has been evaluated by taking $\\Theta^+$ to have spin 1/2 and isospin 0 but either positive or negative parity. We find that the cross section is 10-15 nb if $\\Theta^+$ has positive parity as predicted by the chiral soliton model. The cross section is reduced by more than a factor of 10 if $\\Theta^+$ has negative parity as given by lattice QCD studies. For both parities, the differential distribution peaks at small negative four momentum transfer as expected from the dominating $t$-channel kaon-exchange diagram that involves only the coupling of $\\Theta^+$ to $KN$.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-10-30T20:51:24.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "14.20.-c",
      "13.75.Gx",
      "13.75.Jz",
      "12.39.Mk"
    ],
    "keywords": [
      "cross section",
      "production",
      "pentaquark",
      "chiral soliton model",
      "jefferson national laboratory"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. C"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 15,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 631914
    }
  }
}