Bartosz Kozłowski
supervisor: Katarzyna Grebieszkow
The NA61/SHINE is an experiment studying hadron production in proton-proton, proton-nucleus and nucleus-nucleus collision at the Super Proton Synchrotron (SPS) at the European Organization for Nuclear Research (CERN). The physic program is focused on study of the properties of the onset of deconfinement and searching for the critical point of the strongly interacting matter.
Resonance production is one of the key observables to study the dynamics of high-energy collisions. In particular, it was predicted that in dense nuclear matter their properties (e.g., widths, masses) can be modified as a result of the partial chiral symmetry restoration. The analysis of K*(892)0 meson allows to better understand the time evolution of high-energy nucleus-nucleus collision, particularly the ratio of K*(892)0 to charge kaons is used to determine the time between chemical (end of inelastic interactions in the system) and thermal/kinetic (end of elastic interactions) freeze-outs.
Using data collected by the NA61/SHINE experiment and template method used in analysis of K*(892)0 production in proton-proton interactions at 158 GeV/c beam momentum, analysis of the production of K*(892)0 meson in Ar+Sc inelastic collisions at SPS energies is being performed. The aim of the analysis is to determine width and mass, calculate mean multiplicities of K*(892)0 resonances and estimate time interval between chemical and kinetic freeze-outs in nucleus-nucleus collisions.