  In the framework of the $U(2)_{R}\times U(2)_{L}$ symmetric linear sigma
model with (axial)vector mesons generalized by including a dilaton field we
study the phenomenology of the scalar-isoscalar resonances below 2 GeV. It
turns out that, in our favoured scenario, the resonance $f_{0}(1370)$ is
predominantly a $\bar{q}q$ state and $f_{0}(1500)$ is predominantly a glueball
state. Additionally we are able to calculate the value of the gluon condensate,
which is in agreement with lattice QCD results.
