Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-01-17
Physics
High Energy Physics
High Energy Physics - Phenomenology
Plenary talk at XII Conference on Hadron Spectroscopy, Frascati 2007
Scientific paper
This review summarises issues that have arisen since the appearance of "Rumsfeld Hadrons". We show that signals $\phi(2175)$; Y(4260) and $\Upsilon(10890)$ in the \ssbar, \cc and \bb share features that point to the possible role of $\pi$ exchange forces between flavoured mesons generating effects that can mimic hybrid mesons. The flavour dependence of these phenomena may help to resolve this question.
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