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Quarkonium

  • Claude Amsler
Chapter
Part of the Lecture Notes in Physics book series (LNP, volume 949)

Abstract

Quarkonia are mesons made of \(q\overline {q}\) pairs of the same flavour, such as the Jψ(1S) (\(c\overline {c}\) “charmonium”), the Υ(1S) (\(b\overline {b}\) “bottomonium”), and even the ϕ (\(s\overline {s}\) “strangeonium”), as well as their radial and orbital excitations. These states are bound by the strong interaction mediated by gluons. The term “quarkonium” has been coined in analogy to the electromagnetically bound e+e system (positronium). In the previous section we have dealt with the \(c\overline {c}\) and \(b\overline {b}\) ground state ( = 0) vector mesons and their radial excitations (ψ and Υ sequences). The present chapter is devoted to their  > 0 orbital excitations.

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  • Claude Amsler
    • 1
    • 2
  1. 1.Stefan Meyer InstituteAustrian Academy of SciencesViennaAustria
  2. 2.Physics InstituteUniversity of ZurichZurichSwitzerland

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