Speaker
Description
Title:
Insights into Nuclear Geometry and Initial Conditions of Heavy-Ion Collisions from ATLAS
Abstract:
Constraining the properties of Quark-Gluon Plasma (QGP) formed in heavy-ion collisions faces significant uncertainties from modeling of initial conditions. Recent measurements show that the overlap region captures a snapshot of nuclear geometry on an event-by-event basis, which, in turn, can be leveraged to constrain other aspects of the initial condition better. In this talk, I will present ATLAS measurements of flow and its correlation with mean transverse momentum, to measure the deformation of 129Xe. In addition to overlap geometry, the initial state includes various sources of fluctuations, which are challenging to constrain. I will also discuss recent ATLAS measurements of transverse momentum fluctuations in Pb+Pb and Xe+Xe collisions which have been used to disentangle these fluctuations. In addition, these measurements offer a direct way to extract the speed of sound in the medium, though with some caveats, which will be discussed. Lastly, I will demonstrate how these findings pave the way for fresh perspectives and innovative approaches for future studies on space-time evolution of heavy-ion collisions.
About the speaker:
Mr. Somadutta Bhatta is a Ph.D. candidate at Stony Brook University, USA. He received his Masters degree from the National Institute of Science Education and Research (NISER), India. He is a member of RHIC-STAR and LHC-ATLAS collaborations, with a research focus on the study of correlations and fluctuations in relativistic heavy-ion collisions.
