Isf0(1500) a scalar glueball?
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Abstract
Following the discovery of two new scalar mesons ${\mathit{f}}_{0}$(1370) and ${\mathit{f}}_{0}$(1500) at the Low Energy Antiproton Ring at CERN, we argue that the observed properties of this pair are incompatible with them both being QQ\ifmmode\bar\else\textasciimacron\fi{} mesons. We show instead that ${\mathit{f}}_{0}$(1500) is compatible with the ground state glueball expected around 1500 MeV mixed with the nearby states of the ${0}^{++}$QQ\ifmmode\bar\else\textasciimacron\fi{} nonet. Tests of this hypothesis include the prediction of a further scalar state ${\mathit{f}}_{0}^{\ensuremath{'}}$(1500--1800) which couples strongly to KK\ifmmode\bar\else\textasciimacron\fi{}, \ensuremath{\eta}\ensuremath{\eta}, and \ensuremath{\eta}\ensuremath{\eta}\ensuremath{'}. Signatures for a possible tensor glueball at \ensuremath{\sim}2 GeV are also considered. \textcopyright{} 1995 The American Physical Society.
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