Speaker
Description
The scalar and the tensor glueballs ($J^{PC}=0^{++}$ and $2^{++}$) are, according to lattice results, the two lightest particle in the Yang-Mills sector of QCD. We study the scattering of two scalar and two tensor glueballs starting from the well known dilaton potential, that depends on a single dimentionful parameter, denoted as $\Lambda_G$. Upon a proper choice of the unitarization scheme, we find that, from the scattering of two scalar glueballs, a bound state, called glueballonium, can form if $\Lambda_G$ is small enough (namely, the smaller $\Lambda_G$, the larger the attraction). Additionally, we use these scattering results to estimate the correction of the interactions to the pressure of a glueball gas, that describes the YM thermodynamics in the confined phase.
