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arXiv · 2112.04348

Singlet-octet-glueball mixing of scalar mesons

Eberhard Klempt·Andrey V. Sarantsev
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Abstract

The mixing angles between scalar isoscalar resonances and a scalar glueball are determined from their decays into two pseudoscalar mesons. For $f_0(1370)$ and $f_0(1500)$, at most a small glueball component is admitted by the data. The decay modes of $f_0(1710)$, $f_0(1770)$, $f_0(2020)$, and $f_0(2100)$ require significant glueball fractions. Above this mass, the errors in the decay frequencies become too large to extract a glueball component. The summation of all observed glueball fractions up to 2100\,MeV yields (78\er18)\%. The glueball fractions as function of the mass are consistent with a scalar glueball at 1965\,MeV and a width of 370\,MeV as suggested by a measurement of the yield of scalar isoscalar mesons in radiative $J/ψ$ decays.

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Eberhard Klempt, Andrey V. Sarantsev. 2022-01-14. Singlet-octet-glueball mixing of scalar mesons. https://doi.org/10.1016/j.physletb.2022.136906

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