Phenomenology of Dilaton in a Chiral Linear Sigma Model with Vector Mesons
Abstract
In the framework of the U(2)R× 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 f0(1370) is predominantly a qq state and f0(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.
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