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Quarkonia

  • M. Krammer
  • H. Krasemann
Conference paper
Part of the Acta Physica Austriaca book series (FEWBODY, volume 21/1979)

Abstract

When the J/ψ and ψ’ were discovered in fall 1974 [1] we all witnessed a dramatic and beautiful revival of the quark model [2]. The predicted new quark flavour, c = charm [3] could be added to the hadron spectroscopy by the interpretation of the new particles as c\( \overline{c} \) bound states. It was argued that the new system is nonrelativistic: Charmonium [4]. Whereas the old mesons suffered from the fact that the quarks are extremely relativistic (mass differences are of the order of the masses themselves), in Charmonium the heavy (≈ 1.5 GeV) c-quarks should move relatively slowly, β2 = (v/c)2 ≈ 0.2. The well known powerful methods of exploring a nonrelativistic system could be used. This was the source of real excitement about the new particles.

Keywords

Quark Mass Schrodinger Equation Colour Singlet Gluon Exchange Dipole Matrix Element 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag 1979

Authors and Affiliations

  • M. Krammer
    • 1
  • H. Krasemann
    • 1
  1. 1.Deutsches Elektronen-Synchrotron DESYHamburg 52Germany

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