1208.5397 (Stanislaus Janowski)

Phenomenology of Dilaton in a Chiral Linear Sigma Model with Vector
Mesons    [PDF]

Stanislaus Janowski

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.

View original: http://arxiv.org/abs/1208.5397