Revisiting Scalar Glueballs

It is commonly believed that the lowest-lying scalar glueball lies somewhere in the isosinglet scalar mesons f0(1370), f0(1500) and f0(1710) denoted generically by f0. In this work we consider lattice calculations and experimental data to infer the glue and qq components of f0. These include the calculations of the scalar glueball masses in quenched and unquenched lattice QCD, measurements of the radiative decays J/ψ→γf0, the ratio of f0 decays to ππ, KK and ηη, the ratio of J/ψ decays to f0(1710)ω and f0(1710)ϕ, the f0 contributions to Bs→J/ψπ+π−, and the near mass degeneracy of a0(1450) and K∗0(1430). All analyses suggest the prominent glueball nature of f0(1710) and the flavor octet structure of f0(1500)