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Is $f_0(1500)$ a Scalar Glueball?
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abstract
Following the discovery of two new scalar mesons, $f_0(1370)$ and $f_0(1500)$ at the Low Energy Antiproton Ring at CERN, we argue that the observed properties of this pair are incompatible with them both being $\qqbar$ mesons. We show instead that $f_0(1500)$ is compatible with the ground state glueball expected around 1500 MeV mixed with the nearby states of the $0^{++}$ $Q\bar{Q}$ nonet. Tests of this hypothesis include the prediction of a further scalar state, $f_0'(1500 - 1800)$ which couples strongly to $K\bar{K}$, $\eta\eta$ and $\eta\eta'$. Signatures for a possible tensor glueball at $\sim $2 GeV are also considered.
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Cited by 1 Pith paper
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Light scalar mesons in D^+, D_s^+ decays into three pseudoscalars
A fit of D_s^+ -> K Kbar pi amplitudes supports a tetraquark plus instanton-mixing picture of light scalar mesons, with mixed success in other charm decay channels.
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