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@ARTICLE{Krewald:43375,
      author       = {Krewald, S. and Lemmer, R. H. and Sassen, F. P.},
      title        = {{L}ifetime of {K}aonium},
      journal      = {Physical review / D},
      volume       = {69},
      number       = {1},
      issn         = {1550-7998},
      address      = {[S.l.]},
      publisher    = {Soc.},
      reportid     = {PreJuSER-43375},
      pages        = {016003},
      year         = {2004},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The kaon-antikaon system is studied in both the atomic and
                      the strongly interacting sector. We discuss the influence of
                      the structures of the f(0)(980) and the a(0)(980) mesons on
                      the lifetime of kaonium. The strong interactions are
                      generated by vector meson exchange within the framework of
                      the standard SU(3)(V)xSU(3)(A) invariant effective
                      Lagrangian. In the atomic sector, the energy levels and
                      decay widths of kaonium are determined by an eigenvalue
                      equation of the Kudryavtsev-Popov type, with the strong
                      interaction effects entering through the complex scattering
                      length for K (K) over bar scattering and annihilation. The
                      presence of two scalar mesons f(0)(980) and a(0)(980) leads
                      to a ground state energy for the kaonium atom that is
                      shifted above the point Coulomb value by a few hundred eV.
                      The effect on the lifetime for the kaonium decay into two
                      pions is much more dramatic. This lifetime is reduced by two
                      orders of magnitude from 1.2x10(-16) sec for annihilation in
                      a pure Coulomb field down to 3.2x10(-18) sec when the strong
                      interactions are included. The analysis of the two photon
                      decay width of the f(0)(980) suggests a generalization of
                      the molecular picture which reduces the lifetime of kaonium
                      still further to 1.1x10(-18) sec.},
      keywords     = {K+ K-: bound state (INSPIRE) / atom: exotic (INSPIRE) /
                      bound state: lifetime (INSPIRE) / a0(980) (INSPIRE) /
                      f0(980) (INSPIRE) / vector meson: exchange (INSPIRE) /
                      effective Lagrangian (INSPIRE) / symmetry: SU(3) x SU(3)
                      (INSPIRE) / energy levels (INSPIRE) / K anti-K: annihilation
                      (INSPIRE) / potential (INSPIRE) / K anti-K: scattering
                      length (INSPIRE) / binding energy (INSPIRE) / pi+ pi-:
                      annihilation (INSPIRE) / K: pair production (INSPIRE) / mass
                      spectrum (INSPIRE) / bound state: wave function (INSPIRE) /
                      ground state (INSPIRE) / numerical calculations (INSPIRE) /
                      tables (INSPIRE) / bibliography (INSPIRE)},
      cin          = {IKP-TH},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB223},
      pnm          = {Physik der Hadronen},
      pid          = {G:(DE-Juel1)FUEK241},
      shelfmark    = {Astronomy $\&$ Astrophysics / Physics, Particles $\&$
                      Fields / 11.10.St / 14.40.Aq / 14.40.Cs / 36.10.-k},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000188785800064},
      eprint       = {hep-ph/0307288},
      howpublished = {arXiv:hep-ph/0307288},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:hep-ph/0307288;\%\%$},
      eprint       = {oai:arXiv.org:hep-ph/0307288},
      howpublished = {arXiv:oai:arXiv.org:hep-ph/0307288},
      archivePrefix = {arXiv},
      SLACcitation = {$\%\%CITATION$ = $arXiv:oai:arXiv.org:hep-ph/0307288;\%\%$},
      doi          = {10.1103/PhysRevD.69.016003},
      url          = {https://juser.fz-juelich.de/record/43375},
}