Double Charmonia Production in Exclusive ZZ Boson Decays

Dec 7, 2017
14 pages
Published in:
  • Mod.Phys.Lett.A 33 (2018) 14, 1850078
  • Published: May 9, 2018
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Abstract: (WSP)
This paper is devoted to systematic analysis of double charmonium production in exclusive Z-boson decays in the framework of non-relativistic quantum chromodynamics (NRQCD) and leading twist light-cone (LC) models. Theoretical predictions for branching fractions of all considered decays are presented. According to the obtained results in the case of the allowed helicity suppression rule processes, the effect of internal quark motion increases the branching fractions by a factor 1.5, while for forbidden reactions the LC predictions are strictly zero, while NRQCD ones are significantly smaller than for allowed.
Note:
  • 10 pages, 2 figures, 2 tables. arXiv admin note: substantial text overlap with arXiv:1706.04091
  • 13.38.Dg
  • 14.40.Pq
  • NRQCD
  • LC
  • rare Z-boson decays
  • Charmonia production
  • charmonium: multiple production
  • Z0: decay
  • exclusive reaction
  • quantum chromodynamics: nonrelativistic