Prof. Zbroszczyk among the winners of the SONATA BIS competition

Prof. Hanna Zbroszczyk will implement the project "Exploration of the QCD Phase Diagram of Strongly Affecting Matter in HADES and CBM Experiments at GSI / FAIR" financed by the National Science Center under the SONATA BIS program.

The scientific goal of the project is to create a new team from the Faculty of Physics of the Warsaw University of Technology (PW) in close cooperation as part of two experiments carried out at GSI Helmholtzzentrum für Schwerionenforschung in Darmstadt / FAIR: Facility for Antiproton and Ion Research: HADES and CBM. The results of almost three decades of relativistic studies of heavy ion collisions, and in particular the decade related to the use of the largest accelerators: LHC at CERN and RHIC at BNL, led to the creation of a new state of matter in which the so-called quark degrees of freedom are released, i.e. the smallest and at the same time indivisible components of matter. However, the results so far described conditions for high temperature and low values of baryon chemical potential, where the mutual proportions of baryons and anti-barions are almost identical. By using lower energies of collision of elementary particles and heavy ions, it is possible to study the properties of matter with lower temperature and higher baryon density values describing neutron stars. The aim of our project will be to study the phase diagram of quantum chromodynamics in a hitherto unexplored region of the phase diagram, relevant to one of the hottest topics in astrophysics recently - neutron stars through particle correlation analysis. The CBM experiment carried out at FAIR will play a unique role in the exploration of the QCD phase diagram due to its unique ability to measure a very large amount of data per unit of time, the speed of interaction, which will allow to obtain measurement results with extremely high precision. Understanding the QCD phase diagram is one of the most important goals in relativistic heavy ion physics. So far, several methods have been proposed to study the baryon density regions in neutron stars, here we focus on particle correlations, which is our original contribution and is the subject of this project. Femtoscopy is an experimental technique related to the femto (1 fm) scale, the size of which cannot be measured by any other experimental technique. The works are planned as part of two experiments: the already operating HADES and CBM, which is under construction. The effects sought are an important element of our knowledge about the structure and properties of matter. We are convinced that our results will contribute to setting new directions of research in the physics of relativistic nuclear reactions. The results of these studies also directly relate to the understanding of the first moments of the universe's evolution.