Revisiting scalar glueballs

It is commonly believed that the lowest-lying scalar glueball lies somewhere in the isosinglet scalar mesons f(0)(1370), f(0)(1500) and f(0)(1710) denoted generically by f(0). In this work we consider lattice calculations and experimental data to infer the glue and q (q) over bar components of f(0). These include the calculations of the scalar glueball masses in quenched and unquenched lattice QCD, measurements of the radiative decays J/psi -> gamma f(0), the ratio of f(0) decays to pi pi, K (K) over bar and eta eta, the ratio of J/psi decays to f(0)(1710)omega and f(0)(1710)phi, the f(0) contributions to B-s -> J/psi pi(+)pi(-), and the near mass degeneracy of a(0)(1450) and K-0*(1430). All analyses suggest the prominent glueball nature of f(0)(1710) and the flavor octet structure of f(0)(1500).