Singlet-octet-glueball mixing of scalar mesons

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 +/- 18)%. The glueball fractions as function of the mass are consistent with a scalar glueball at 1865 MeV and a width of 370 MeV as suggested by a measurement of the yield of scalar isoscalar mesons in radiative J/Psi decays. (c) 2022 The Authors. Published by Elsevier B.V.This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP(3).

Automated summary

The mixing angles between scalar isoscalar resonances and a scalar glueball are determined from their decays into two pseudoscalar mesons. Results show that a small glueball component is admitted by some scalar isoscalar resonances, while significant glueball fractions are required for other resonances. The summation of all observed glueball fractions yields approximately 78%.