Speaker
Description
Title: The First Measurement of Medium Modification of Energy-Energy Correlator
Speaker: Jussi Viinikainen (Vanderbilt University)
Abstract:
Energy-energy correlators can isolate physics of different angular scales, which has attracted a lot of interest recently to study it in heavy ion environments. Any modification from proton-proton reference can reveal hints about the inner workings of the quark-gluon plasma. The large underlying event in the heavy ion collisions provides an experimental challenge for this measurement. In this seminar, I will present the first measurement of the energy-energy correlator of jets in heavy ion collisions using lead-lead data at 5.02 TeV collected by CMS. I will present the details on how the underlying event contribution in lead-lead collisions can be removed. Doing this, we observe significant modifications over the pp reference. I will discuss the implications of these observations and potential future directions of energy correlator measurements.
About the speaker:
Jussi Viinikainen earned his PhD from the University of Jyväskylä in Finland, where he conducted research with the ALICE experiment. Following his doctoral studies, he joined the CMS experiment as a postdoctoral researcher at the University of Illinois at Chicago and later at Vanderbilt University. His primary research interests focus on jet production in p-p, p-A and A-A collisions, including jet-particle and jet-jet correlations. Within the CMS collaboration, Dr. Viinikainen served as the convener of the High-Transverse-Momentum Physics Working Group.
