2022-08-12 14:37


Conference: Bucharest University Faculty of Physics 2016 Meeting

Section: Nuclear and Elementary Particles Physics

Correlations in Au-Au collisions at FAIR-GSI energies. Simulations for CBM Experiment

Camelia BOGDAN (1), Alexandru JIPA (1), Oana RISTEA (1), Catalin RISTEA(1,2)

1)Faculty of Physics, University of Bucharest

2)Institute of Space Science Bucharest-Magurele


relativistic nuclear collisions, correlations, FAIR, CBM Experiment, phase transitions

For the study of the phase diagram of nuclear matter at high baryonic densities, heavy ion collisions at relativistic energies will be carried out using a system of new synchrotrons - SIS-100 and SIS-300 - which are part of the Facility for Antiproton and Ion Research (FAIR) at GSI Helmholtz Centre for Heavy Ion Research (Darmstadt, Germany). Among the experimental set-ups proposed is the Compressed Baryonic Matter (CBM) Experiment. In this experiment measurements of diagnostic probes of the initial phase of the fireball evolution will be done. Thus, it offers the possibility to find signatures of partonic degrees of freedom, to study the first order deconfinement phase transition, present at high baryonic densities and to investigate the modifications of hadronic properties in nuclear matter, in order to bring insights regarding the phenomenon of chiral symmetry restoration in dense nuclear matter. The aim of the study is to present an analysis of the results obtained from simulations using the YaPT online framework, for Au-Au collisions at a few energies available at the two mentioned synchrotrons, for the CBM experiment (2-25 A GeV). The UrQMD (Ultrarelativistic Quantum Molecular Dynamics) code, frequently used in description of the dynamics of relativistic nuclear collisions, was used. The simulated results have been analysed using own macros in ROOT (Rapid Object-Oriented Technology). The most important results obtained from the study of signals which occur in the hot and dense part of the nuclear matter, for charged hadrons, are discussed. Thus, the various aspects regarding the possible fluctuations and correlations in particle emission and behaviour of transverse momentum for different incident energies per nucleon are taken into consideration. At the same time, interesting results have been obtained from the rapidity distributions of charged particle and fireball evolution at increasingly higher energies. These results confirm current predictions regarding the necessary conditions for the formation of quark-gluon plasma in hot and dense nuclear matter.