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Near-threshold production of a0(980)-mesons in the reaction \(\rm {pp \rightarrow d K^ + \bar{K^0}}\)

  • V. Yu. Grishina
  • L. A. Kondratyuk
  • M. BüscherEmail author
  • W. Cassing
Article

Abstract.

Using an effective Lagrangian approach as well as the Quark-Gluon Strings Model, we analyze near-threshold production of a 0(980)-mesons in the reaction \(NN\rightarrow d K\bar{K}\) as well as the background of non-resonant \(K\bar{K}\)-pair production. We argue that the reaction \(pp \rightarrow d K^ + \bar{K}^0\) at an energy release \(Q\leq 100\)MeV is dominated by the intermediate production of the a 0(980)-resonance. At larger energies the non-resonant \(K^ + \bar{K}^0\)-pair production --where the kaons are produced in a relative P-wave-- becomes important. The effects of final-state interactions are evaluated in a unitarized scattering length approach and found to be in the order of a 20% suppression close to threshold. Thus, in present experiments at the Cooler Synchrotron COSY-Jülich for \(Q \leq 107\)MeV the a 0 + signal can reliably be separated from the non-resonant \(K^ + \bar{K^0}\) background.

Keywords

Present Experiment Energy Release Pair Production Intermediate Production Large Energy 
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Copyright information

© Springer-Verlag Berlin/Heidelberg 2004

Authors and Affiliations

  • V. Yu. Grishina
    • 1
  • L. A. Kondratyuk
    • 2
  • M. Büscher
    • 3
    Email author
  • W. Cassing
    • 4
  1. 1.Institute for Nuclear ResearchMoscowRussia
  2. 2.Institute of Theoretical and Experimental PhysicsMoscowRussia
  3. 3.Institut für KernphysikForschungszentrum JülichJülichGermany
  4. 4.Institut für Theoretische PhysikUniversität GiessenGiessenGermany

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