Heavy quarks and long-lived hadrons

Phys. Rev. D 12, 1404 – Published 1 September 1975
Thomas Appelquist and H. David Politzer


In a recent Letter we reported on some work which led us to suggest the possibility of narrow spikes in the e+e- annihilation cross section into hadrons. In this paper, we discuss the theoretical infrastructure of this work more thoroughly, and improve and extend the calculations and experimental predictions. We examine a colored quark-gluon model of hadronic matter, with color an exact SU(3) gauge symmetry. In addition to the light quarks that make up ordinary hadrons, a heavy quark, such as the charmed c, is included. The narrow resonances recently discovered by the MIT-BNL and SLAC-LBL groups are interpreted as cc¯ bound states (orthocharmonium). In this energy range, the effective coupling has become small according to asymptotic freedom, and many aspects of the bound-state structure can be calculated. The existence of 0- (paracharmonium) states is predicted, and decay widths and mass splittings are estimated. The total e+e- cross section into hadrons is predicted to scale asymptotically, with an approach to scaling from above that can be calculated over a large energy range.

DOI: http://dx.doi.org/10.1103/PhysRevD.12.1404

  • Received 14 April 1975
  • Published in the issue dated 1 September 1975

© 1975 The American Physical Society

Authors & Affiliations

Thomas Appelquist*

  • Institute for Advanced Study, Princeton, New Jersey 08540

H. David Politzer

  • California Institute of Technology, Pasadena, California 91125

  • *Alfred P. Sloan Fellow. Research sponsored in part by the U. S. Atomic Energy Commission Grant No. AT(11-1)-2220 and by the National Science Foundation Grant No. NSF GP-40397X, Harvard University.
  • Junior Fellow, Harvard University Society of Fellows. Work supported in part by the U. S. Atomic Energy Commission Grant No. AT(11-1)-68.


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