Gluon-Glueball Duality and Glueball Searches

Abstract

We discuss a notion of gluon-glueball duality analogous to quark-hadron duality. We apply this idea to the radiative decay of heavy orthoquarkonium, $Q\bar{Q}\to \gamma gg$, which has been used to search for glueballs. The duality is first introduced in two simplified contexts: (i) a hypothetical version of QCD without any light quarks and (ii) QCD in the large-$N_c$ limit. We then discuss how an approximate form of this duality could hold in real QCD, based on a hierarchy of time scales in the temporal evolution of the $gg$ subsystem in radiative orthoquarkonium decay. We apply this notion of gluon-glueball duality to suggest a method that could be useful in experimental searches for glueballs.

10 pages, latex

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Cited by in corpus (5)

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• Revisiting Scalar Glueballs
• Study of the pseudoscalar glueball in $J/\psi$ radiative decays
• The tight knot spectrum in QCD
• Upper Limits on a Possible Gluon Mass