Jet properties in PbPb and pp collisions at $\sqrt{s_{NN}} = 5.02~\mathrm{TeV}$

Modifications to high transverse momentum ($p_{\rm T}$) jets in the quark gluon plasma (QGP) are studied in PbPb and pp collisions at $\sqrt{s_{NN}} = 5.02~\mathrm{TeV}$ via correlations between jets with $p_{\rm T} > 120~~\mathrm{GeV}$ and charged particles with $p_{\rm T} > 0.7~\mathrm{GeV}$. This measurement aims to extend results of the same correlations at $\sqrt{s_{NN}} = 2.76~\mathrm{TeV}$, which observed significant modification of jet track correlations out to large distances from the jet axis in central PbPb events. This analysis measures correlations in relative pseudorapidity ($\Delta \eta$), relative azimuth ($\Delta \phi$), and relative distance from the jet axis $\Delta r = \sqrt{\Delta\eta^{2}+\Delta\phi^{2}}$. Results are presented as a function of PbPb collision centrality and track $p_{\rm T}$, providing a differential picture of jet modifications in the medium. Measurements include charged particle densities as a function of distance from jet axis, total charged-particle yields as a function of track-$p_{\rm T}$ (fragmentation functions), and the jet momentum density profile (''jet shape''). This analysis uses data collected with the CMS detector at collision energy $\sqrt{\rm s_{NN}} = 5.02~\mathrm{TeV}$ in 2015, corresponding to integrated luminosities of $404~\mu\mathrm{b}^{-1}$ for PbPb and $27.4~\mathrm{pb}^{-1}$ for pp.