Speaker
Description
In this talk we discuss light and heavy mesons in the frame of the local
NJL-like models and in the frame of the quark model with separable interaction
kernel. The NIL-type model is known for its ability to describe the chiral symmetry
breaking and to describe the properties of matter at finite temperature and density.
However, the description of mesons within this model is limited by the number of
possible flavours of quakrs. The higher the number of flavors introduced, the more
complex the model becomes. To describe heavy mesons, we start from the
Bethe-Salpeter equation chosing the interaction kernel as $D(q-p) =
D0\phi(q^2)\phi(p^2)$ and define the meson vertex functions in Gaussian form. For
te first step we fix the model parameters using the meson electromagnetic, leptonic
decay constants of light mesons. As an application of the model, the transition
formfactorsof light and heavy pseudoscalars and radiative decays of light and
heavy vector mesons are considered. Comparisons of our results with other
calculations are performed. Also the hadronic interactions of charm and bottom
mesons were considered as a base of further study and production and absorption
in hot and dense hadronic matter.
