Net-charge fluctuations in PbPb collisions at 5.02 TeV

Net-charge fluctuation measurements for lead-lead ($\mathrm{PbPb}$) and proton-proton ($\mathrm{pp}$) collisions at $\sqrt{s_\mathrm{NN}}$ = 5.02 $\,\text{TeV}$ are presented. The $\mathrm{PbPb}$ and $\mathrm{pp}$ data were obtained with the CMS detector at the CERN LHC and correspond to integrated luminosities of 0.607 and 252$\,\text{nb}^{-1}$, respectively. A measure of the relative strength of the correlated pairs is determined for a wide range of relative pseudorapidity (with $\Delta \eta<4.8$) and in different centrality intervals using reconstructed tracks with transverse momenta in the range 0.5--3.0$\,\text{GeV}$. An excess of opposite sign pairs is observed that increases with the charged-particle multiplicity.