The first measurement of energy-energy correlator of jets in PbPb collisions at CMS

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. In this presentation, we 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. We observe significant modifications over the pp reference and discuss the implications of these observations.

Reference: J. Viinikainen for the CMS Collaboration, "The first measurement of energy-energy correlator of jets in PbPb collisions at CMS", EPJ Web Conf. 364 (2026) 10011