Decomposing energy balance contributions for quenched jets in PbPb versus pp collisions at $\sqrt{s_{NN}} = 2.76$ TeV

The angular distribution of charged particle momenta in relative pseudorapidity ($\Delta \eta$) and relative azimuth ($\Delta \phi$) with respect to a sample of high transverse momentum dijets is utilized to study the momentum balance of jet fragments in heavy-ion collisions, which is potentially modified due to jet quenching in the Quark Gluon Plasma. This analysis compares the contributions of charged particles of different transverse momenta to study the overall event energy balance in PbPb versus pp collisions using data collected in 2011 and 2013, respectively, at collision energies $\sqrt{\rm s_{NN}} = 2.76$ TeV with integrated luminosities of 166 $\mu \rm{b}^{-1}$ and 5.3 pb$^{-1}$. Distributions of momentum with respect to leading and subleading transverse momentum jets are studied individually, and are decomposed into contributions from jet cones and a long range event-wise azimuthal asymmetry in particle momenta. Results are presented as a function of PbPb collision centrality, track transverse momentum, $\Delta\phi$, and radius parameter $\Delta r = \sqrt{\Delta\eta^{2}+\Delta\phi^{2}}$ for balanced and unbalanced dijets, and are compared to pp reference.