Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-07-09
Phys.Rev.D80:054003,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, latex
Scientific paper
10.1103/PhysRevD.80.054003
We discuss a notion of gluon-glueball duality analogous to quark-hadron duality. We apply this idea to the radiative decay of heavy orthoquarkonium, $Q\bar Q \to \gamma g g$, 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.
Nussinov Shmuel
Shrock Robert
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