Strange particle effective temperatures in relativistic nuclear collisions

The energy dependence of the effective temperatures of charged Icaons, phi and Omega produced in Au + Au collisions at the Relativistic Heavy Ion Collider (RHIC) Beam Energy Scan (BES) energies are presented. At energies around root s(NN )similar to 8 GeV, there is a sudden change in the energy dependence of K-+/- and phi effective temperatures, while at higher energies a slower, continuous rise up to root s(NN) = 2.76 TeV is observed. This behavior is similar with previous SPS results and could indicate the onset of deconfinement in this energy range. The Omega effective temperatures increase with energy and no plateau-like behavior is evidenced by the data.