2024-01-12 11:00  online

Hydrodynamic fluctuations in high-energy heavy-ion collisions

Dr. Azumi Sakai

According to quantum chromodynamics (QCD), the interaction among quarks and gluons becomes smaller at high-temperature and the quark-gluon plasma (QGP) is formed. The high-energy heavy-ion collision experiments are performed to generate QGP and to investigate the properties of them. One of the major discoveries at the Relativistic Heavy Ion Collider (RHIC) is the large magnitude of the elliptic flow. The elliptic flow measured in experiments was consistent with the results from the relativistic hydrodynamic models. For further understanding of the collective flow, the correlation of them has been measured through the factorization ratio. To reproduce the factorization ratio measured in experiments, event-by-event fluctuations play an important role. In my study, I focus on the initial fluctuations and the hydrodynamic fluctuations to explain the factorization ratio. In this seminar, I talk about the space-time evolution of high-energy heavy-ion collisions and the relativistic hydrodynamic model. Then I show the analysis of the effect of the initial fluctuations and the hydrodynamic fluctuations on factorization ratio. This talk is based on the paper: Phys. Lett. B 829 (2022) 137053