Production of hypothetical X0-mesons in high-energy channeling reactions

  • Jürgen Augustin
  • Stefan Graf
  • Walter Greiner
  • Berndt Müller
Part of the NATO ASI Series book series (NSSB, volume 255)


The narrow, correlated e + e line structures observed in heavy ion collisions near the Coulomb barrier still long for an convincing explanation [1]. A possible interpretation of the experiments is the pair-decay of a yet unknown neutral particle X 0 with a mass of about 1.8 MeV. However, is now clear that the X 0 cannot be an elementary particle, but an extended object with internal structure has not been ruled out [2]. Recently a model for a mesonlike X 0 particle consisting of two elementary charged fermions f + and f has been proposed [3]. This model describes many features of the experimental data., including a quantitative estimate of the measured cross sections. Therefore it would be usefull if the exsistence of these exotic particles could be confirmed by different experiments.


Coulomb Barrier Lorentz Factor Photon Spectrum Pair Creation Crystal Length 
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Copyright information

© Plenum Press, New York 1991

Authors and Affiliations

  • Jürgen Augustin
    • 1
    • 2
  • Stefan Graf
    • 2
  • Walter Greiner
    • 2
  • Berndt Müller
    • 1
  1. 1.Physics DepartmentDuke UniversityDurhamUSA
  2. 2.Institut für Theoretische PhysikJoh. Wolfg. Goethe-UniversitätFrankfurt am Main 11Germany

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